解下列方程或不等式(组):
(1)
;
(2)
;
(3)
;
(4)
(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c23658fa2fdc2fe7f83a301d679b4277.png)
(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f46fc4cd4e97f4b29ec17e2fbb2def23.png)
(3)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8c068419da14f7b5653ffa901065ee93.png)
(4)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/97ad0b78193c9426a53d7cd4d33c0e13.png)
22-23七年级上·北京海淀·期末 查看更多[3]
北京市/清华大学附属中学2022-2023学年七年级上学期数学期末测试题(已下线)第一次月考模拟卷(范围:三角形的证明、一元一次不等式与一元一次不等式组)-【单元测试】2022-2023学年八年级数学下册分层训练AB卷(北师大版)(已下线)七年级数学期末模拟卷(北京专用,测试范围:人教版第1章-第4章)-学易金卷:2023-2024学年初中上学期期末模拟考试
更新时间:2023-01-02 12:48:42
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相似题推荐
解答题-问答题
|
困难
(0.15)
解题方法
【推荐1】对于平面直角坐标系
中的线段
,给出如下定义:若存在
使得
,则称
为线段
的“等幂三角形”,点R称为线段
的“等幂点”.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/20/230b3c33-ec6f-498a-89c8-cc61b6c00cc2.png?resizew=286)
(1)已知
.
①在点
中,线段
的“等幂点”是____________;
②若存在等腰
是线段
的“等幂三角形”,求点B的坐标;
(2)已知点C的坐标为
,点D在直线
上,记图形M为以点
为圆心,2为半径的
位于x轴上方的部分.若图形M上存在点E,使得线段
的“等幂三角形”
为锐角三角形,直接写出点D的横坐标
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ee31829d0d4d5f779a957d7df8058ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a5f1641947153c80b987320885a2b57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1c28abb154f41e1ca9816c9c9c2433ca.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b39d252ea57347c07a6e9c111a5dedf8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1c28abb154f41e1ca9816c9c9c2433ca.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a5f1641947153c80b987320885a2b57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a5f1641947153c80b987320885a2b57.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/20/230b3c33-ec6f-498a-89c8-cc61b6c00cc2.png?resizew=286)
(1)已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/888a6b10db4d81e5d2ba969fb576bd78.png)
①在点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a48dd0d22893016ca25b0d68347010c5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef4113c492885ba7c47fe42ac792578f.png)
②若存在等腰
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3fe95f656b98b53f71a9d72bf0c9a4b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef4113c492885ba7c47fe42ac792578f.png)
(2)已知点C的坐标为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cd5ec60091a93eeed17e47e40015c699.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e235d7dd12f948f5ffb2e5afddc95612.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b5131177ca031cc40f438bb4b3322146.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9347ab0d001ed7e8f51f9886ce88ac64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d631f45bc652539853f236952afa5bbf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/97d6ab4479fca30268660739ec6852c3.png)
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【推荐2】若一个函数当自变量在不同范围内取值时,函数表达式不同,则称这样的函数为分段函数,函数
就是分段函数,我们把这个分段函数图像记为图象G.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/5/e5a0452d-dcf5-45f6-aae5-58e679535bcf.png?resizew=244)
(1)当
时,在平面直角坐标系中,画出图象G;
(2)当
时,结合图像G,回答下面问题:
①当函数值
时,求自变量x的值;
②若
和
在图象G,且
,则b的取值范围是___________.
(3)当
时,
,求m的取值范围.
(4)线段
端点坐标分别为
,
,当图象G与线段AB有一个公共点时,则m的取值范围是___________.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6cd1d3ef81d3ba2c6cffcf40df3b097d.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/5/e5a0452d-dcf5-45f6-aae5-58e679535bcf.png?resizew=244)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fd876a2ed79c64bacc3e64b8ee92735e.png)
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fd876a2ed79c64bacc3e64b8ee92735e.png)
①当函数值
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1b6280959e386eed67ce5d6f8da5dcdc.png)
②若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/feb15c4764003ddab47afd5b1578cc7d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca43a2e4ce4740863e11969841cf3560.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2ac67e9a909472ab852d38d2ec66a1e1.png)
(3)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/44261bc6891f81e7188662800427d768.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/93e496c0ed037fdc7143220bdfd86645.png)
(4)线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e09a31c1836e03fb9eac524f3c2067fa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8553f345299f3c5897c240484b7f65a7.png)
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解答题-证明题
|
困难
(0.15)
【推荐3】如图①,平面直角坐标系中,已知点
,其中a,b满足
.将点B向右平移24个单位长度得到点C.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/7/31/4dd8d2c5-ded0-47e1-a9b9-b9248afe9092.png?resizew=494)
(1)求点A和点C的坐标;
(2)如图①,点D为线段
上一动点,点D从点C以2个单位长度/秒的速度向点B运动,同时点E为线段
上一动点,从O点以3个单位长度/秒的速度向点A运动,设运动的时间为t秒
,四边形
的面积记为
(以下同理表示).若
,求t的取值范围;(注:梯形面积
(上底+下底)×高)
(3)如图②,在(2)的条件下,在D,E运动的过程中,
交
于点F,求证:在D,E运动的过程中,
总成立.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dcc8a2c78195a2d798a0cc664becf721.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/baa3592f80c6256fd24a561ac856c770.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/7/31/4dd8d2c5-ded0-47e1-a9b9-b9248afe9092.png?resizew=494)
(1)求点A和点C的坐标;
(2)如图①,点D为线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef4113c492885ba7c47fe42ac792578f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/27b6b3254dba2ef063e8a61e826e86ad.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4d0750a60716249add81d57d58e917ae.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/33937fc1fe2f9d1c9a16b8404d02da8f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d49b7f64574d97989d8255bd98ca690e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a50a39604477d1d9326eb455cda2e838.png)
(3)如图②,在(2)的条件下,在D,E运动的过程中,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/828628c0876b45381c9a0edeb0fec236.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/92964aa8f72142490a01b4b2919a1eec.png)
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解答题-问答题
|
困难
(0.15)
【推荐1】在平面直角坐标系中,点
,
,
,且
,
,
满足
.
(1)当
时,求
的面积;
(2)当实数
变化时,判断
的面积是否发生变化?若不变,说明理由;若变化,求其变化范围;
(3)如图,已知线段
与
轴相交于点
,线段
与线段
交于点
,若
,求实数
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d1acee6e6880d4ba0ea62ff84d862261.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ae1521b9ef72fc0cc86eb9b7c8f98584.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/799534b570cfc7a164e0bb7988b3f954.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/071a7e733d466949ac935b4b8ee8d183.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1d2a9140bc4bf5a34ff4656f05adb523.png)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f22a4a0dd7307a1323d25331e60782d8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
(2)当实数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
(3)如图,已知线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef4113c492885ba7c47fe42ac792578f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6710f4edfe9601e83d4b37b98e73e797.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
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解答题-问答题
|
困难
(0.15)
名校
【推荐2】在平面直角坐标系
中,已知点
,对于点
给出如下定义:将点P向右
或向左
平移
个单位长度,再向上
或向下
平移
个单位长度,得到点
,点
与点M的中点为Q,称点Q为点P的关于点M的“平移中点”.
(1)已知点
.
①若点
,则点Q的坐标是______;
②若点P在直线l:
上运动,当点Q在第二象限时,求点P的横坐标c的取值范围.
(2)已知菱形
的顶点A,B,C,D的坐标分别是
,
,
,
,点
是菱形
上的动点.当点
在直线l:
上运动过程中,若存在点Q在菱形
的边上或者内部,直接写出a的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ee31829d0d4d5f779a957d7df8058ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/299b0531ace62e0752934030d0e7e4af.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d917b1dd4a08c34ad2f2e9255e2d25ee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/79282bbe9f6408297d6378878c423bec.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b216aa192d16c04267efdb25ed87c12.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/058315922cc0ae811d323920f7494219.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b491bdbc050cb2359f46c2e4598e3557.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c0262aa3f8869d79ae5fb1a6a3274091.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c10a72461b1845357cada40904fe8a54.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cee6765a83140d745a6de4c85d9b6b50.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cee6765a83140d745a6de4c85d9b6b50.png)
(1)已知点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eb72ad728c2080cee9e0604a022ba926.png)
①若点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b2182ba396a0cacd78ea7592d04f687.png)
②若点P在直线l:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d9a9b769d70cb6f29e965c800921c8ea.png)
(2)已知菱形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c451e1159edb958b5567ecf6fa23dae.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0ef7629fe45bf6af93bb0b6523e3837e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a8b77523fdb650961e4cc870e12180d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1b21e4e37fac271bff90fff91d4ef311.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d917b1dd4a08c34ad2f2e9255e2d25ee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/299b0531ace62e0752934030d0e7e4af.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d9a9b769d70cb6f29e965c800921c8ea.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
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