抢分通关01函数选填压轴题
![](https://img.xkw.com/dksih/QBM/2024/5/21/3501352349712384/STRUCT/25a276ace9db47df98e57f886e81fa9b.png?resizew=171)
(含一次函数、二次函数、反比例函数等综合问题)
![](https://img.xkw.com/dksih/QBM/2024/5/21/3501352349712384/STRUCT/64558fcb4e49443b936fa42e30f69589.png?resizew=436)
目录【中考预测】预测考向,总结常考点及应对的策略
【误区点拨】点拨常见的易错点
【抢分通关】精选名校模拟题,讲解通关策略(含新考法、新情境等)
![](https://img.xkw.com/dksih/QBM/2024/5/21/3501352349712384/STRUCT/64558fcb4e49443b936fa42e30f69589.png?resizew=436)
一次函数、二次函数、反比例函数在中考选择题、填空题考场中是热点内容,更是全国中考的必考内容.每年都有一些考生因为知识残缺、基础不牢、技能不熟、答欠规范等原因导致失分.
1.从考点频率看,一次函数、二次函数、反比例函数图象和性质是高频考点、必考点,所以必须提高对函数图象和性质理解和掌握的能力.
2.从题型角度看,以选择题、填空题最后一题为主,分值3分左右,着实不少!
![](https://img.xkw.com/dksih/QBM/2024/5/21/3501352349712384/STRUCT/7de2002cd1f1428f8043980f6ceafb42.png?resizew=176)
易错点一 反比例函数求K值未考虑图象所在的象限
【例1】 (2024·湖南长沙·三模)
如图,点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
是反比例函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/75cb90e72041e9139d4964f529ae1728.png)
图像上的一点,过点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
作
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/52cbeb9b1c1d637b903cf3e5c7f730f6.png)
轴于点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
,点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
轴上.若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d23b488f961d9fde37feb7f5c497c0d9.png)
的面积是3,则
______.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/31/7cf85e46-1862-47a9-967b-0b94a40154e0.png?resizew=128)
2024-03-29更新
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528次组卷
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3卷引用:2024年湖南省长沙市部分学校中考三模数学试题2024年湖南省长沙市部分学校中考三模数学试题(已下线)专题11.27 反比例函数(常考核心知识点分类专题)(基础练)-2023-2024学年八年级数学下册基础知识专项突破讲与练(苏科版)(已下线)抢分通关01 函数选填压轴题(含一次函数、二次函数、反比例函数等综合问题,3类易错+4类题型)-备战2024年中考数学抢分秘籍(全国通用)
【例2】 (2024·安徽合肥·一模)
如图,已知反比例函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/07854693dd2e33f66030d6106eb6e0ee.png)
(
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e10eb41754e40597840588d0ae13dd5b.png)
)的图象经过
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d5b352fa3e781df195ceccca90c3932a.png)
斜边
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef4113c492885ba7c47fe42ac792578f.png)
的中点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
,且与直角边
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
相交于点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
.若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2bbf9680f74a9ac5d934304654ce2771.png)
的面积为9,则
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
的值为
______.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/23/b158b00b-7a4d-4e56-b0b4-fc32ef41aa01.png?resizew=162)
2024-03-22更新
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425次组卷
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2卷引用:2024年安徽省合肥市中考一模数学试题(已下线)2024年安徽省合肥市中考一模数学试题(已下线)抢分通关01 函数选填压轴题(含一次函数、二次函数、反比例函数等综合问题,3类易错+4类题型)-备战2024年中考数学抢分秘籍(全国通用)
【例3】 (2024·辽宁沈阳·模拟预测)
如图,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd967903ed5a6f640a5b801ec8be0070.png)
的边
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/69bf093299f0a975d68dc684fb67a393.png)
轴,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f2db72b6fc489cb38c3bb8f5da69ce54.png)
的延长线过原点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
,且
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/38586fe93acaacaeabe67feea485b92b.png)
,反比例函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c9940526785ca763da2dfa35e77c934.png)
的图象经过点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
,若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd967903ed5a6f640a5b801ec8be0070.png)
的面积是2,则
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
的值为
___________.
2024-03-31更新
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374次组卷
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2卷引用:2024年辽宁省沈阳市协作体中考零模考试数学模拟预测题
![](https://img.xkw.com/dksih/QBM/2024/5/21/3501352349712384/STRUCT/975c179a39e14c3c8ebf6ca073c92183.png?resizew=678)
易错点二 一次函数、反比例函数、二次函数图象共存问题
【例1】 (2024·安徽合肥·一模)
已知反比例函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/07854693dd2e33f66030d6106eb6e0ee.png)
的图象与一次函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c9bd144e0e96e4236a14523e0729cacb.png)
的图象如图所示,则函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fdd03949d3e709611047cacf54557e0e.png)
的图象大致为(
)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/4/2/9f5b9d7f-ec33-425a-bd11-b35afe7c336e.png?resizew=176)
2024-04-01更新
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422次组卷
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3卷引用:2024年安徽省合肥市长丰县中考一模数学试题2024年安徽省合肥市长丰县中考一模数学试题(已下线)安徽省中考数学模拟押题卷-2024年中考数学【热点·重点·难点】专练(安徽专用)(已下线)抢分通关01 函数选填压轴题(含一次函数、二次函数、反比例函数等综合问题,3类易错+4类题型)-备战2024年中考数学抢分秘籍(全国通用)
【例2】 (2024·内蒙古呼和浩特·模拟预测)
如图,在平面直角坐标系中,经过
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/edcbc328ed803646d8646560050ed0ad.png)
的一次函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54015ff5b49e3283901da1291b6b921d.png)
的图象与经过
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1fcf82d01c39fd2c96e1edba0ad37dd6.png)
的一次函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/46f6872ffb1934339c53c2c2282d5889.png)
的图象相交于点
C.若点
C的纵坐标为3,则函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dbf57e6cc22e332089f3a8c941e06d7.png)
的大致图象是(
)
2024-03-22更新
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444次组卷
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4卷引用:内蒙古自治区呼和浩特市实验中学2023-2024学年九年级下学期校模数学模拟预测题
【例3】 (2024·安徽芜湖·一模)
已知反比例函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c7385795d7eab9691e21172c51a97428.png)
在第二象限内的图像与一次函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5e136e7637543c8ae92c8dcd55b31924.png)
的图像如图所示,则函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cab85e01dca720590e47c5d3e605f971.png)
的图像可能为(
)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/26/3eae168a-af2d-4999-999e-44d94f5912ae.png?resizew=115)
2024-03-22更新
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492次组卷
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7卷引用:2024年安徽省芜湖市鸠江区部分学校中考一模数学试题
![](https://img.xkw.com/dksih/QBM/2024/5/21/3501352349712384/STRUCT/db3ea5e0d1464a7c8e516d74a5de7254.png?resizew=679)
易错点三 根据二次函数的图象讨论各系数a,b,c有关式子正误
【例1】 (2024·四川达州·模拟预测)
二次函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a90385c676848de67293e3ed6bc000fe.png)
的图象如图所示,其对称轴为直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1c98a7f3a8bf384b1dfc1d34aebd46d2.png)
,且经过点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ccc8350b12974ffc8d06fce36d158f02.png)
,下列结论:①
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/77694c11ba40ec5c2fc4f6a05e31a048.png)
;
②
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/697c3d4b11fc2ae913cc27b6b63fc199.png)
; ③点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/efa2ca11b78954ac5b1c493c2f18f4a2.png)
和
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/13290a80adddb2ce2eb27c03d28af7e7.png)
在抛物线上,当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/64c6f8aeb7e1cbb2d9876f5b6bca54b3.png)
时,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/25f99df1a7b58018125b99578b779342.png)
;④不等式
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f95f3fa710253c107b6e8fb458108b0d.png)
的解集是
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/07468e723520c9ad690a8472d0529b57.png)
或
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/239ff12eb6cba0100f0dadb847c90ea8.png)
;⑤一元二次方程
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b90bf45f18d95ba729ad9e53f03c5d76.png)
的两根分别为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4675b3bd0036a76340e71887baec3a29.png)
,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7eba583e37243f3ba166bd1c11e58498.png)
.其中错误的个数有(
)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/31/becee34f-fe62-42eb-84db-62d44d4b9c7a.png?resizew=134)
2024-03-30更新
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391次组卷
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5卷引用:2023年四川省达州市渠县中学中考5月份数学模拟预测题
【例2】 (2024·湖南永州·一模)
如图,抛物线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a90385c676848de67293e3ed6bc000fe.png)
的图像与
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
轴相交于
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2375a27ead9549550676d4e6a2b47243.png)
、
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9a1dae05f42110fde12a61fca98bc408.png)
两点,与
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
轴相交于点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
,以下结论:①
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4630bb948780be53bc73d9ddef875000.png)
;②
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73c21bd0bd90a89b7ff5ac0eacf612a5.png)
;③当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/061813f1ec633c5c4c393c4de7938322.png)
时,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e152bef293bc745aee921dbdf179e9d8.png)
;④
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9a31d3ff0489fd0dec060f5f1cc30117.png)
.正确的个数为(
)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/31/7bfd344c-f589-4c36-8e20-9b9bd7a6f6e3.png?resizew=142)
2024-03-29更新
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336次组卷
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2卷引用:2024年湖南省永州市中考一模数学试题
【例3】 (2024·陕西榆林·一模)
在平面直角坐标系中,二次函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e04702f417fc63d6c899bd9b1c1a3fe6.png)
为常数,且
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f28b08682efa2692b052f64fe1448fce.png)
的图象如图所示,其对称轴为直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/707ea658f3a9359f5740d5aab48f7948.png)
,有以下结论:①
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2684b72f9f38f5046c8ecd4280b7b14b.png)
;②
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c514e0f8997ad4c41d7b9a5d367a8785.png)
;③
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e0c865c1f8d424665e0f756aa600ff1.png)
;④
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a4236b6131fab1849437a594a811a9f5.png)
,其中正确的个数为(
)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/30/f63a16c4-311d-4ada-8b67-a2846e2bf499.jpg?resizew=119)
2024-03-29更新
|
355次组卷
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2卷引用:2024年陕西省榆林市榆阳区中考一模数学试题
【例4】 (2024·四川成都·模拟预测)
已知抛物线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fcc90b02a4cd1425aabfc192b1cdee17.png)
的对称轴为直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef00713e73b8357cc7900144f5505bc6.png)
,部分图象如图所示,给出下面4个结论:①
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/375386102cba5bfd93bdf340216eb22d.png)
;②
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/62df04f8417a2491dfe142ebb4cf618e.png)
;③
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a26c9ec37686678fbaf97ca69ac2af43.png)
;④若点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f91a15468ecd2dc1a3ee5d20fdc51c8d.png)
,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2b1a1b9baa3f275d0418419a1c39f2ae.png)
在抛物线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fcc90b02a4cd1425aabfc192b1cdee17.png)
上,则
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2ac67e9a909472ab852d38d2ec66a1e1.png)
.其中正确的结论有(
)
2024-03-29更新
|
355次组卷
|
2卷引用:2024年四川省成都市中考预测卷数学模拟预测题(一)
![](https://img.xkw.com/dksih/QBM/2024/5/21/3501352349712384/STRUCT/541c1e840ca147a3916aa016c58fcc94.png?resizew=679)
![](https://img.xkw.com/dksih/QBM/2024/5/21/3501352349712384/STRUCT/ffb1e384fdad4bf093edbd2406c1c044.png?resizew=179)
题型一 反比例函数与特殊四边形 ![](https://img.xkw.com/dksih/QBM/2024/5/21/3501352349712384/STRUCT/0fbaf353d8b1423e9caad997d75de379.png?resizew=114)
【例1】(2024·山西大同·一模)
如图,在平面直角坐标系
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ee31829d0d4d5f779a957d7df8058ab.png)
中,矩形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3241d7fedd89d85711acd7a2635298af.png)
的两边
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6aa3b68ece9e596ed7d4ec91a117218a.png)
分别在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
轴、
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
轴的正半轴上,反比例函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/07854693dd2e33f66030d6106eb6e0ee.png)
的图象与
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
相交于点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
,与
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
相交于点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
,若点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
的坐标为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fd1aea9283d5df642160c47f6680782d.png)
的面积是
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ad9de54606c4a72d0f8decb6b0e63b2.png)
,则
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
的值为
______.
2024-03-21更新
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623次组卷
|
4卷引用:2024年山西省大同市平城区两校联考一模数学试题
![](https://img.xkw.com/dksih/QBM/2024/5/21/3501352349712384/STRUCT/196b1f1e2f9541e08924a4036e148d92.png?resizew=650)
![](https://img.xkw.com/dksih/QBM/2024/5/21/3501352349712384/STRUCT/7efe7ab800334e0eab6d147c8931d802.png?resizew=113)
(2024·安徽合肥·一模)
如图,菱形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
的顶点
B在
y轴的正半轴上,
C在
x轴的正半轴上,
A,
D在第一象限,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d58f4fa90e6a54c669aacf8f0b43caa0.png)
轴,反比例函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c7385795d7eab9691e21172c51a97428.png)
的图象经过面积为2的菱形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
的中心
E,交
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
于点
F.
(1)
k的值为
______.
(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cb15b8e4a91a55b03111148a89953f04.png)
的值为
______.
2024-03-22更新
|
333次组卷
|
2卷引用:2024年安徽省合肥市庆平希望学校中考一模数学试题
(2024·安徽阜阳·一模)
如图,在平面直角坐标系中,一次函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a7652a63cc1cf3b00d0f496cd1fabe13.png)
的图像分别与
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
轴、
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
轴交于
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
两点.正方形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a7cefa14a90337bbbb6e378d8a892d5.png)
的顶点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
在第一象限,且顶点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ec00b28e3a25c4025287d877b7483f25.png)
在反比例函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c7385795d7eab9691e21172c51a97428.png)
的图像上.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/21/a705f6da-f196-4d5c-9498-bb0734dd645d.png?resizew=135)
(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/866b81a8384cce4f24867baca2e6820c.png)
的面积为
_____________;
(2)若正方形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a7cefa14a90337bbbb6e378d8a892d5.png)
向左平移
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
个单位长度后,顶点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a3f57f005a9592ea89ae2a2cee6598c9.png)
恰好落在反比例函数的图像上,则
_________.
2024-03-21更新
|
449次组卷
|
4卷引用:2024年安徽省阜阳市太和县中考一模数学试题2024年安徽省阜阳市太和县中考一模数学试题(已下线)专题11.17 反比例函数(全章分层练习)(培优练)-2023-2024学年八年级数学下册基础知识专项突破讲与练(苏科版)(已下线)专题11.24 反比例函数几何问题(平移问题)-2023-2024学年八年级数学下册基础知识专项突破讲与练(苏科版)(已下线)抢分通关01 函数选填压轴题(含一次函数、二次函数、反比例函数等综合问题,3类易错+4类题型)-备战2024年中考数学抢分秘籍(全国通用)
题型二 一次函数与反比例函数 ![](https://img.xkw.com/dksih/QBM/2024/5/21/3501352349712384/STRUCT/0fbaf353d8b1423e9caad997d75de379.png?resizew=114)
【例1】(2024·四川成都·一模)
如图,在平面直角坐标系
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ee31829d0d4d5f779a957d7df8058ab.png)
中,直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aae342dcb93e0e6f017093cacc5ac977.png)
与双曲线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/646e11d5bff57e56ce82c2339f2d71ce.png)
交于点
A、点
B,将直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
向下平移
b个单位后双曲线交于点
C、点
D,
M是第二象限内一点,连接
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b66a5b7813e902306477f91f9f4084cd.png)
、
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8e5c62f22d7afc5627fcb86599faa8e1.png)
,若以
M为位似中心的
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/781e6927e3bc512359dc8b0c11e195d5.png)
与
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6a11cb104b04c4e6a1be700e81da279a.png)
位似,位似比为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a4b8503f4706b8321e4e79a87eadea84.png)
,则
b的值为
______.
2024-03-25更新
|
324次组卷
|
3卷引用:2024年四川省成都市郫都区九年级中考数学一诊试题2024年四川省成都市郫都区九年级中考数学一诊试题(已下线)查补重难点03 反比例函数与一次函数的综合运用-【查漏补缺】2024年中考数学复习冲刺过关(江苏专用)(已下线)抢分通关01 函数选填压轴题(含一次函数、二次函数、反比例函数等综合问题,3类易错+4类题型)-备战2024年中考数学抢分秘籍(全国通用)
![](https://img.xkw.com/dksih/QBM/2024/5/21/3501352349712384/STRUCT/34a23608d03d4c96abd4a351c02cd086.png?resizew=650)
【例2】(2024·安徽池州·一模)
如图,已知直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54878c2a56a054a79dfa95e4f3708970.png)
与
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
轴、
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
轴分别交于点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
.请解决下列问题:
(1)线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
的长为
______;
(2)若菱形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2fa7bbd7831e9ff4f8cffc8889d34f05.png)
的边
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e70c93718be1e6197b7783d62c963ae1.png)
轴,另一边
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
在直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
上,且点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
是
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
的中点,点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
在反比例函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/af46c692403636be328f42d9f8241a82.png)
的图象上,则
______.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/23/a18d4855-768e-4c15-8cac-52a8824f4397.png?resizew=156)
2024-03-22更新
|
392次组卷
|
4卷引用:2024年安徽省池州市中考联考一模数学试题
![](https://img.xkw.com/dksih/QBM/2024/5/21/3501352349712384/STRUCT/7efe7ab800334e0eab6d147c8931d802.png?resizew=113)
(2024·新疆·一模)
已知在平面直角坐标系中,点
O是坐标原点,直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c15fb18163df0690365a0d2e7ee88f5a.png)
与
x轴、
y轴分别交于点
A,
B,与双曲线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/05621b18b7ffc991d9f30380e2e08fea.png)
相交于点
C,
D,且点
D的坐标为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2bef326848c6bdbcf3eb0033cb039267.png)
.如图,当点
A落在
x轴负半轴时,过点
C作
x轴的垂线垂足为
E,过点
D作
y轴的垂线,垂足为
F,连接
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
.当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/823daf64f1dae3a7546d4c2a9fabdf99.png)
时,则点
C的坐标为
______.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/31/03d6cb07-ecd7-498d-9176-eca164c8eee3.png?resizew=193)
2024-03-31更新
|
336次组卷
|
2卷引用:2024年新疆生产建设兵团地区部分学校中考模拟考试数学模拟试题
题型三 几何图形中动点之函数问题 ![](https://img.xkw.com/dksih/QBM/2024/5/21/3501352349712384/STRUCT/0fbaf353d8b1423e9caad997d75de379.png?resizew=114)
【例1】(2024·河南信阳·一模)
如图1,已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5138a9f70d5e8b0580e30fef6eb7baef.png)
的边长
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/41322821ce31416fdac8dd6e0aa41c71.png)
,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/56d3c9ce32b721995f355eea411340e3.png)
,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3e3f5dc11efe60b4fd9a13b1d6b83842.png)
于点
E.现将
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e742966e3711cfa53dce04022acf4bcc.png)
沿
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
方向以每秒1个单位的速度匀速运动,运动的
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e742966e3711cfa53dce04022acf4bcc.png)
与
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5138a9f70d5e8b0580e30fef6eb7baef.png)
重叠部分的面积
S与运动时间
t的函数图象如图2,则当
t为9时,
S的值是(
)
2024-03-31更新
|
910次组卷
|
5卷引用:2024年河南省信阳市一模数学模拟试题
![](https://img.xkw.com/dksih/QBM/2024/5/21/3501352349712384/STRUCT/74fb864608244ba6858b9859e80f80db.png?resizew=650)
【例2】(2024·河南濮阳·一模)
如图1,在矩形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
中,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c8c6b2a254af0fc250aa148a0da60662.png)
为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
的中点,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
是线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
上的一动点.设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/65eb62fc7266277a509a889ced3a6c36.png)
,图2是
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
关于
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
的函数图象,其中
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
是图象上的最低点,则
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
的值为(
)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/4/1/e3b30127-3b87-4f5b-b7ed-261f0520e432.png?resizew=239)
A.7 | B.8 | C.![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d581ff306fe98572d894daaca3fcaa87.png) | D.![](https://staticzujuan.xkw.com/quesimg/Upload/formula/92cb9a526f2b146415a98051b4e58b42.png) |
2024-03-31更新
|
376次组卷
|
4卷引用:2024年河南省濮阳市南乐县中考一模数学模拟试题
![](https://img.xkw.com/dksih/QBM/2024/5/21/3501352349712384/STRUCT/7efe7ab800334e0eab6d147c8931d802.png?resizew=113)
(2024·河南周口·一模)
如图1,矩形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
中,点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
的中点,动点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
从点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
出发,沿折线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a319c9d2962839da0f9c6ac66c45e429.png)
匀速运动,到达点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
时停止运动,连接
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20a541b81584a032f571159ea152c85a.png)
、
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fc5adb5eb60ae4435a12d93854066298.png)
,设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20a541b81584a032f571159ea152c85a.png)
为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fc5adb5eb60ae4435a12d93854066298.png)
为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
,且
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
关于
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
的函数图象如图2所示,则
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20a541b81584a032f571159ea152c85a.png)
的最大值为(
)
2024-03-31更新
|
321次组卷
|
2卷引用:2024年河南省周口市郸城县多校联考一模数学模拟试题
(2024·安徽合肥·一模)
如图,在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
中,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7e3262fc038bbec5e7c8cc47df08bef7.png)
,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4b10134e7a46e6f6f7cb9d5e2371727d.png)
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
与矩形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b2257da1e2425f2ea9ac7440f52659ff.png)
的一边
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
都在直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
上,其中
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d2c15801fee2405573677484f5dcfa4.png)
、
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/82773737609e65dea3c5c67099f1b10d.png)
、
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1496042c1d721cffd25053e997a9a97.png)
,且点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
位于点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
处.将
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
沿直线,向右平移,直到点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
与点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
重合为止.记点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
平移的距离为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
与矩形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b2257da1e2425f2ea9ac7440f52659ff.png)
重叠区域面积为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
,则
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
关于
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
的函数图象大致为(
)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/31/7f8cc2b4-56eb-43ce-a78e-cd2aaeed1caf.png?resizew=240)
2024-03-29更新
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928次组卷
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5卷引用:2024年安徽省合肥市瑶海区中考一模数学试题
(2024·河南平顶山·一模)
如图1,在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
中,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e075468e7fb0bf30229aec01a7205977.png)
.动点
P从点
A出发沿折线
A→
B→
C匀速运动至点
C后停止.设点
P的运动路程为
x,线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20a541b81584a032f571159ea152c85a.png)
的长度为
y,图2是
y随
x变化的关系图像,其中
M为曲线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
的最低点,则
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
的面积为(
)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/30/2aa92571-3aa6-4a6f-be14-5cd2d9fec5cb.png?resizew=332)
2024-03-29更新
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585次组卷
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5卷引用:2024年河南省平顶山中考数学一模模拟试题
题型四 二次函数与其他函数综合问题 ![](https://img.xkw.com/dksih/QBM/2024/5/21/3501352349712384/STRUCT/0fbaf353d8b1423e9caad997d75de379.png?resizew=114)
【例1】(2024·安徽宿州·一模)
如图,已知抛物线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bc93a53c569ce551f6a9cc886c9bab0d.png)
(
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
是常数且
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/94440d3e4c073f94f2b266ff99d50e74.png)
)和线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
,点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
和点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
的坐标分别为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/06c16f9cbb40fc6ad7bfcc276f3166fa.png)
.
(1)抛物线的对称轴为直线
______;
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b550ee821ee1838384835e81fc34b67.png)
时,将抛物线向上平移
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d3d17816617696dc58a42cacaa454e18.png)
个单位长度后与线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
仅有一个交点,则
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
的取值范围是
______.
2024-03-24更新
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336次组卷
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2卷引用:2024年安徽省宿州市泗县部分学校中考一模数学试题
![](https://img.xkw.com/dksih/QBM/2024/5/21/3501352349712384/STRUCT/24fc326bed51441691d19117af0575dc.png?resizew=652)
![](https://img.xkw.com/dksih/QBM/2024/5/21/3501352349712384/STRUCT/7efe7ab800334e0eab6d147c8931d802.png?resizew=113)
(2024·安徽合肥·一模)
我们定义:如果一个函数图象上存在纵坐标是横坐标6倍的点,则把该函数称为“行知函数”,该点称为“行知点”,例如:“行知函数”
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1de361d9ca3315a51d0e91d0f0b45dfa.png)
,其“行知点”为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ddfb7224eb5a92987d39f61c81f6780.png)
.
(1)直接写出函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b0963f4512b335f3a2cfaeeb968a0da.png)
图象上的“行知点”是
__________;
(2)若二次函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6cb1b3db6d6e86cda62beb14f8f4d3b5.png)
的图象上只有一个“行知点”,则
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
的值为
__________.
2024-03-31更新
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369次组卷
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3卷引用:2024年安徽省合肥市瑶海区行知教育集团中考一模数学试题
(2024·辽宁沈阳·模拟预测)
如图,在平面直角坐标系中,抛物线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b73ec2e51e8bf082ec95b5ce8348de68.png)
与
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
轴交于
A,
B两点,与
y轴交于点
C,点
D在抛物线上,且与点
C关于抛物线对称轴对称,则点
D坐标为
_________ ,连接
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/683c590673eece14fea3319c4fd5eb55.png)
,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7d97dc3b752832906de41447bb58a341.png)
,点
P在抛物线第四象限内不与
B,
C两点重合.过点
P作
y轴的垂线与线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
交于点
E,以
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fc5adb5eb60ae4435a12d93854066298.png)
为边作
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d244880e9a28a02df25b4e864b28975e.png)
,使
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4126b0fdc0538e0462be8f5f0a777af7.png)
,点
F在点
E的下方,且
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7158fff1ee0ebf49f3542b048756381.png)
,点
F恰好落在射线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
上,再将
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/91b51d3992644d37dc71c9b5a97d515c.png)
绕点
E旋转得到
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d9790c87b438d9cd5f715860139bdafa.png)
(点
P的对应点为点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cee6765a83140d745a6de4c85d9b6b50.png)
,点
F的对应点为点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f8e55590555905eb4f57889bbd16e39a.png)
),当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fea8578ed02bbdaa1d8838483dbae5cc.png)
与
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/683c590673eece14fea3319c4fd5eb55.png)
垂直时,点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cee6765a83140d745a6de4c85d9b6b50.png)
的横坐标为
__________ .
2024-03-26更新
|
376次组卷
|
2卷引用:2024学年辽宁省沈阳市和平区九年级下学期学科学情调查问卷(和平区零模统考)数学模拟预测题