如图,菱形
的面积为24,对角线
,动点E,F分别以每秒1个单位长度的速度同时从点A出发,点E沿折线
方向运动,点F沿折线着
方向运动,当两者相遇时停止运动.设运动时间为x秒,点E,F的距离为y.
(2)在给定的平面直角坐标系中画出这个函数的图象,并写出该函数的一条性质;
(3)结合函数图象,直接写出当
时x的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/454328a8e75953fdb0835ce80d9566e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bfd66776565f049eb453c14fcaf79234.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3087da5c11909dab613378fee8d471fc.png)
(2)在给定的平面直角坐标系中画出这个函数的图象,并写出该函数的一条性质;
(3)结合函数图象,直接写出当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2823ad28c60c024e5e74215f07550bfa.png)
23-24九年级下·重庆渝北·阶段练习 查看更多[2]
重庆市渝北实验中学校2023-2024学年九年级下学期数学3月月考模拟试题(已下线)中考重点05 动态几何+函数图像(6题型+满分技巧+限时检测)-2024年中考数学【热点·重点·难点】专练(重庆专用)
更新时间:2024-03-20 19:27:13
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相似题推荐
解答题-作图题
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【推荐1】如图,AB∥CD,AB=5cm,AC=4cm,线段AC上有一动点E,连接BE,ED,∠BED=∠A=60°,设A,E两点间的距离为xcm,C,D两点间的距离为ycm.
小明根据学习函数的经验,对函数y随自变量x的变化而变化的规律进行了探究.下面是小明的探究过程,请补充完整.
(1)列表:如表的已知数据是根据A,E两点间的距离x进行取点、画图、测量,分别得到了x与y的几组对应值:
请你补全表格;
(2)描点、连线:在平面直角坐标系xOy中,描出表中各组数值所对应的点(x,y),并画出函数y关于x的图象;
(3)探究性质:随着自变量x的不断增大,函数y的变化趋势: ;
(4)解决问题:当AE=2CD时,CD的长度大约是 cm.
小明根据学习函数的经验,对函数y随自变量x的变化而变化的规律进行了探究.下面是小明的探究过程,请补充完整.
(1)列表:如表的已知数据是根据A,E两点间的距离x进行取点、画图、测量,分别得到了x与y的几组对应值:
x/cm | 0 | 0.5 | 1 | 1.5 | 2 | 2.3 | 2.5 |
y/cm | 0 | 0.39 | 0.75 | 1.07 | 1.33 | 1.45 | |
x/cm | 2.8 | 3.2 | 3.5 | 3.6 | 3.8 | 3.9 | |
y/cm | 1.53 | 1.42 | 1.17 | 1.03 | 0.63 | 0.35 |
请你补全表格;
(2)描点、连线:在平面直角坐标系xOy中,描出表中各组数值所对应的点(x,y),并画出函数y关于x的图象;
(3)探究性质:随着自变量x的不断增大,函数y的变化趋势: ;
(4)解决问题:当AE=2CD时,CD的长度大约是 cm.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/11/14/5b02d57a-de8f-4180-8db5-956dc28e7410.png?resizew=161)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/11/14/6a26be52-72a7-4660-a26e-7be315b9d754.png?resizew=235)
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【推荐2】如图,在
中,
,点D是
的中点,
.点P从点B出发,沿
方向移动到点C停止(点P可与线段端点重合),过点P作
交
于点Q,设点P的运动路程为x,线段
的长度为
.请回答以下问题:
(1)直接写出
与x之间的函数关系式,并注明自变量x的取值范围;
(2)在直角坐标系中画出
与x的函数图象,并写出该函数的一条性质;
(3)若
的函数图象如图所示,结合你画出的
与x的函数图象,直接写出当
时,自变量x的取值范围.(保留一位小数,误差不超过
)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/047dc9795efa99b6fb9fdf9778085dab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5aac0052863b3f85bd6ae91d42720ac1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1da0304251a6a0966cd5238660dfa9b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/902f24325565a9dd95128a633a240da2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a5f1641947153c80b987320885a2b57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54015ff5b49e3283901da1291b6b921d.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/8/21/8bbef044-7178-4a2f-bd46-2279f9633b6a.png?resizew=321)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/8/20/9ccce249-1b5d-4e20-8e50-ca2e465932de.png?resizew=201)
(1)直接写出
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54015ff5b49e3283901da1291b6b921d.png)
(2)在直角坐标系中画出
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54015ff5b49e3283901da1291b6b921d.png)
(3)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/424be0f19cb65f984169be8f8ec362e8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54015ff5b49e3283901da1291b6b921d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9be542aa319f37703659e3820cfc0311.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4646418552dc060ebda1232361a01295.png)
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【推荐1】小华同学学习函数知识后,对函数
通过列表﹣描点﹣连线,画出了如图所示的图象.
请根据图象解答:
(1)【观察发现】
①完成描点,把图象补充完整;
②表格中:
______,
______;
③写出函数的一条性质:______;
④若函数图象上的两点
,
满足
,则
.______(填“对或错”)
(2)【延伸探究】如图2,将过
,
两点的直线向下平移n(
)个单位长度后,得到直线l与函数
的图象交于点P,连接
,
.
①求当
时,直线l的解析式和
的面积;
②直接用含n的代数式表示
的面积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4d8f4cf0277e880d4576a63cfb6f7683.png)
请根据图象解答:
(1)【观察发现】
①完成描点,把图象补充完整;
②表格中:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/380bbacf854e30e2e747fc286d2b9997.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ccd4162c7d09f970cb77cadacdbe521.png)
③写出函数的一条性质:______;
④若函数图象上的两点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2693f047cefe8477d055076b0fb25a03.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/590a7d430703d2d41a0171ff6a97dac5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4c2e41c64ac5508a9ba27b697122d6d5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/af264166c2e807ff3cba297019106ae4.png)
(2)【延伸探究】如图2,将过
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bc5ef36a359b18282afc7ae46bd1ec41.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2925fa2dcd09db1ca0ff66fd8ebc4b43.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/401b7a6ae9616f1f3a27ff11c8abf2f0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/91e1b400e6ed5576c4aceabcdbb95c0a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd33764ff4efddfe11a98a609753715c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2be49c37e30a3ced0364c3e74d8c687.png)
①求当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be604061cf1591f7069472269d4c9719.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2205cffebf8c4d5f81d15ed7b85c8936.png)
②直接用含n的代数式表示
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2205cffebf8c4d5f81d15ed7b85c8936.png)
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【推荐2】如图,如图,在
中,
,
,
,点P从点B出发,沿折线
运动,当它到达点A时停止,设点P运动的路程为x,点Q是射线
上一点,
,连接
设
,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/16/540b6a42-4783-4596-b5c3-6351ac688ef5.png?resizew=362)
(1)求出
,
与x的函数关系式,并注明x的取值范围;
(2)补全表格中
的值;
以表中各组对应值作为点的坐标,在直角坐标系内描出相应的点,并在x的取值范围内画出
的函数图象;
(3)在直角坐标系内直接画出
函数图象,结合
和
的函数图象,求出当
时,x的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd967903ed5a6f640a5b801ec8be0070.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ed10df4140819d5451773a45de66201b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e65a3e478bb87d094e3a0af30dd10ae8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d70dc2c20619a4fc12a0cfda59af5b69.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b98f36ceb1c8988071d660c9d4338eab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9abaeba15f3abdd877bc701af52c5cd9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d41275132e3d60be01d3fa55de57727d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cb6ede9761b5b90f8dc137708e1ee90f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bea27cd709ddd9c9140e7df9f73af99.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8fc3271ecc6e525e8d19db0a5c4c0e03.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/16/540b6a42-4783-4596-b5c3-6351ac688ef5.png?resizew=362)
(1)求出
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54015ff5b49e3283901da1291b6b921d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/46f6872ffb1934339c53c2c2282d5889.png)
(2)补全表格中
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54015ff5b49e3283901da1291b6b921d.png)
x | 1 | 2 | 3 | 4 | 6 |
![]() |
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54015ff5b49e3283901da1291b6b921d.png)
(3)在直角坐标系内直接画出
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/46f6872ffb1934339c53c2c2282d5889.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54015ff5b49e3283901da1291b6b921d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/46f6872ffb1934339c53c2c2282d5889.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2ac67e9a909472ab852d38d2ec66a1e1.png)
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【推荐1】某工人为一客户制作一长方形防盗窗,为了牢固和美观,设计如图所示,中间为三个菱形,其中左右为两个全等的大菱形,中间为一个小菱形,竖着的铁棍的间距是相等的,尺寸如图所示(单位:m),工人师傅要做这样的一个防盗窗,总共需要多长的铁棍(不计损耗?)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/11/6/4a025ed3-bd48-4706-af17-d4501e24cb9a.png?resizew=186)
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【推荐2】如图,在菱形ABCD中,对角线AC与BD相交于点O,过点D作DE⊥BD交BC的延长线于点E.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/11/14/50acb2d7-8d9d-4653-9247-91fae5bea629.png?resizew=187)
(1)求证:四边形ACED是平行四边形;
(2)若AB=
,DE=3,求BD的值.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/11/14/50acb2d7-8d9d-4653-9247-91fae5bea629.png?resizew=187)
(1)求证:四边形ACED是平行四边形;
(2)若AB=
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/533a7b702ada1dd80123e4041271d521.png)
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【推荐1】如图,在平面直角坐标系中,点
,过点
作
轴的垂线,垂足为A.作
轴的垂线,垂足为C.点
从
出发,沿
轴正方向以每秒1个单位长度运动;点
从
出发,沿
轴正方向以每秒3个单位长度运动;点
从
出发,沿
方向以每秒2个单位长度运动.当点
运动到点A时,三点随之停止运动,运动过程中
关于直线
的对称图形是
,设运动时间为
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/19/97e9e614-0f20-4f92-bf04-e2b3124eddcc.png?resizew=379)
(1)用含
的代数式分别表示点
和点
的坐标:
_____________,
_____________
(2)若
与以点
为顶点的三角形相似,求
的值;
(3)当
时,求
点在坐标.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d0bee1e9d8958e644455cdd3431636f7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7dea2ae9d515f9ab351ad72306b776ee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/32e00bf73d03dded1cf5f83cc5339361.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4d4ff4aece6bbdb9693dd2a3bbc0bea0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/19/97e9e614-0f20-4f92-bf04-e2b3124eddcc.png?resizew=379)
(1)用含
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/32e00bf73d03dded1cf5f83cc5339361.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1f8e45b50c77bf6a2cde628ea3455ac9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
(3)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8cbeede118c407a800b05757b9a1393e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/12fe32dfbd66709875c5b9f79c9496da.png)
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解答题-证明题
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【推荐2】阅读:三角形的一条边的平方等于另两条边的积,称这个三角形为优美三角形,这条边称为优美边.
![](https://img.xkw.com/dksih/QBM/2020/1/27/2386259530489856/2386942724571136/STEM/a5fe5069-ebcf-425d-92c9-94dbb7d7d1cd.png)
(1)已知
是优美三角形,且
,
,求
的长;
(2)如图,四边形
中,
,
,
.求证:
是优美三角形.
![](https://img.xkw.com/dksih/QBM/2020/1/27/2386259530489856/2386942724571136/STEM/a5fe5069-ebcf-425d-92c9-94dbb7d7d1cd.png)
(1)已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0faed94a64b2dcfc6801b4fca0f16675.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca036d049f5205cf04cb1b9c5cd03f97.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fcd0ced286a0fbc7e4862f8147264277.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
(2)如图,四边形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e735a28578ba191da6d4f3b0f8e8729.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/34e0a957a55460c72673c0f2ee90dbb3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1bedb2ea4872221104f0b144f85b8ff4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0faed94a64b2dcfc6801b4fca0f16675.png)
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