如图,在平面直角坐标系中,直线
分别交x轴、y轴于点A、B,直线
交直线
于点C,交x轴于点
.
(2)若点C在第二象限,
的面积是5;
①求点C的坐标;
②直接写出不等式组
的解集;
③将
沿x轴平移,点C、A、D的对应点分别为
、
、
,设点
的横坐标为m.直接写出平移过程中
只有两个顶点在
外部时,m的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fceb9eb57ca36db386ffafeda213599c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5d501afbd7542f2f724b658edf39af4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fceb9eb57ca36db386ffafeda213599c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0d776a89f4fd29dccffe1040069d59ee.png)
(2)若点C在第二象限,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ac451db3443cabb204f96c31fd4a02e.png)
①求点C的坐标;
②直接写出不等式组
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d8d294671a75966e728ff69a7e395d45.png)
③将
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8a4a514e2e338c6fa31c9938624a4a71.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1241216f3c1cb5e73043dd1037f556d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a18722354086c42e62334983fc50eb6a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6795cae2df43a722e1355e9562d93c09.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6795cae2df43a722e1355e9562d93c09.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ccc5dc6c4238062946f8e1820a9f19e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2036191be2322003aaee6bb411868327.png)
22-23八年级下·吉林长春·期中 查看更多[3]
吉林省长春市净月实验中学2022-2023学年八年级下学期期中数学试题(已下线)猜想02 一元一次不等式与一元一次不等式组(考题猜想,常考易错6个考点35题专练)-2023-2024学年八年级数学下学期期中考点大串讲(北师大版)(已下线)压轴真题必刷06 解答题(压轴40题训练)-2023-2024学年八年级数学下学期期中考点大串讲(北师大版)
更新时间:2023-10-14 19:44:10
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【推荐1】如图,抛物线y=ax2﹣2ax﹣3a(a≠0)与x轴交于点A,B.与y轴交于点C.连接AC,BC.已知
ABC的面积为2.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/18/9b448dd5-e325-43c1-af09-49f19d2761d9.png?resizew=547)
(1)求抛物线的解析式;
(2)平行于x轴的直线与抛物线从左到右依次交于P,Q两点.过P,Q向x轴作垂线,垂足分别为G,H.若四边形PGHQ为正方形,求正方形的边长;
(3)抛物线上是否存在一点N,使得∠BCN=∠CAB﹣∠CBA,若存在,请求出满足条件N点的横坐标,若不存在请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce4cba95fc7d4853a243f8e3fb20ce70.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/18/9b448dd5-e325-43c1-af09-49f19d2761d9.png?resizew=547)
(1)求抛物线的解析式;
(2)平行于x轴的直线与抛物线从左到右依次交于P,Q两点.过P,Q向x轴作垂线,垂足分别为G,H.若四边形PGHQ为正方形,求正方形的边长;
(3)抛物线上是否存在一点N,使得∠BCN=∠CAB﹣∠CBA,若存在,请求出满足条件N点的横坐标,若不存在请说明理由.
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【推荐2】抛物线
交
轴于
两点(
在
的左边),已知
坐标
,抛物线交
轴于点
.
(2)如图1,点
在抛物线段
上,过点
作
轴垂线,分别交
轴、线段
于
两点,连接
,若
与
相似,求点
的坐标;
(3)如图2,将抛物线
平移得到抛物线
,其顶点为原点,直线
与抛物线交于
两点,过
的中点
作直线
(异于直线
)交抛物线
于
两点,直线
与直线
交于点
.问点
是否在一条定直线上?若是,求该直线的解析式;若不是,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c9210c2d5aaf1148f273ade23a56723c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e52586ca2a3b783bc8092415e2d4bf6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9ee8c50793afd59e6ab4a2be5a877759.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/560bf4e85df3883f9369b913c88403db.png)
(2)如图1,点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d3a51949f48ee8cf746851ba779b078e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4cae70b8a9d2d2e96dea62c00ced04b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c15514bc735fe4b744672edefe00009c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ff39c7aa648afd1080206c8080ff79e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
(3)如图2,将抛物线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1241216f3c1cb5e73043dd1037f556d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23f3ffe7abc59e2f65d827c8eab8d36a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08b9f0b9e53a83e68f5fec944f343119.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/652d9ffab80c0e447ce8374ea220738b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/307bd991211ec79b47a4be52933bb8e7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73465a1f9aa03481295bf6bd3c6903ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/307bd991211ec79b47a4be52933bb8e7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23f3ffe7abc59e2f65d827c8eab8d36a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6670479a0083dd2dfd5ad55b47b1ab6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a4cfef623a9534b5708df5f95f1760a5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a459f78e4a3516d8a8535290ede7f386.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
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【推荐1】如图所示,在平面直角坐标系中,直线
与x轴交于点A,与y轴交于点B.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/9/14/f7355860-4841-4832-9d10-cefbc416f94f.png?resizew=254)
(1)求点A、
的坐标;
(2)在
轴上是否存在点P,使以A、B、P三点为顶点的三角形是等腰三角形?若存在,请求出点P的坐标;若不存在,请说明理由.
(3)若直线
交y轴负半轴于点
,点
在直线
上,且
,求点
、D的坐标.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aae342dcb93e0e6f017093cacc5ac977.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/9/14/f7355860-4841-4832-9d10-cefbc416f94f.png?resizew=254)
(1)求点A、
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
(2)在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
(3)若直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/822ba132ca9dd0d4a050659aef3c9b26.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9953b7b5c647641edbec4c2ab90a65f4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
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【推荐2】如图,直线l:y=﹣x+1与x轴,y轴分别交于A,B两点,点P,Q是直线l上的两个动点,且点P在第二象限,点Q在第四象限,∠POQ=135°.
![](https://img.xkw.com/dksih/QBM/2016/7/18/1574220031991808/1574220038406144/STEM/05f6ec28c8394353b7dfa47e480f57e4.png?resizew=169)
(1)求△AOB的周长;
(2)设AQ=t>0,试用含t的代数式表示点P的坐标;
(3)当动点P,Q在直线l上运动到使得△AOQ与△BPO的周长相等时,记tan∠AOQ=m,若过点A的二次函数y=ax2+bx+c同时满足以下两个条件:
①6a+3b+2c=0;
②当m≤x≤m+2时,函数y的最大值等于
,求二次项系数a的值.
![](https://img.xkw.com/dksih/QBM/2016/7/18/1574220031991808/1574220038406144/STEM/05f6ec28c8394353b7dfa47e480f57e4.png?resizew=169)
(1)求△AOB的周长;
(2)设AQ=t>0,试用含t的代数式表示点P的坐标;
(3)当动点P,Q在直线l上运动到使得△AOQ与△BPO的周长相等时,记tan∠AOQ=m,若过点A的二次函数y=ax2+bx+c同时满足以下两个条件:
①6a+3b+2c=0;
②当m≤x≤m+2时,函数y的最大值等于
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acfab2f9ded739cfe24674bf96403c99.png)
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【推荐1】如图,已知函数
的图象与y轴交于点A,一次函数
的图象经过点
,与x轴以及
的图象分别交于点C,D,且点D的坐标为
.
,
,
;
(2)若函数
的值大于函数
的函数值,则x的取值范围是 ;
(3)则四边形
的面积 ;
(4)在平面内是否存在点P,使得以点P,C,D为顶点的三角形是以
为腰的等腰直角三角形,若存在,请直接写出点P的坐标;若不存在,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ab466aedd6e176088d8dee7bc3e3aaa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c15fb18163df0690365a0d2e7ee88f5a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3544997cc034ed882c0d0a3bdbf5f957.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ab466aedd6e176088d8dee7bc3e3aaa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/26c9e6536dd347d9079bee07eaf4580c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd707b69a11f8de5566f23c1a2a9ff5a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ccd4162c7d09f970cb77cadacdbe521.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f3cb8d72bb2e281b943b3b430138ef7.png)
(2)若函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c15fb18163df0690365a0d2e7ee88f5a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ab466aedd6e176088d8dee7bc3e3aaa.png)
(3)则四边形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8735e2de0ec29640d1eff9e043556030.png)
(4)在平面内是否存在点P,使得以点P,C,D为顶点的三角形是以
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
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【推荐2】在平面直角坐标系中,点O为坐标原点,直线
交x轴于点A,交y轴于点B,直线
交x轴于点C,交y轴于点D,两直线交于点E,
,
.
(2)如图2,点P在x轴上,过点P作x轴的垂线交射线
于点M,交射线
于点N,设点P的横坐标为t,线段
的长为d,求d与t之间的函数关系式,直接写出t的取值范围;
(3)如图3,在(2)的条件下,
,点H在直线
上,点F在x轴上,点G在直线
上,连接
和
, 当四边形
为矩形,且
时,求点G的坐标.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c31c4f39399ec245a67db2933ed639f2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c15fb18163df0690365a0d2e7ee88f5a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36bba287ee8a7017b80007573d8105ad.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a975578a646b192ebe243c833ff54ec3.png)
(2)如图2,点P在x轴上,过点P作x轴的垂线交射线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ccaee8f228ff24e7c89879bb5b999cf2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/21037e170bdbb322558e79c40c00b454.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
(3)如图3,在(2)的条件下,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5748495a9d6a364f488e288a4d2bf5a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/53b95463a97c60db3250cb641bf6523d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c63e36329f5e0979f5ee776ac5d06327.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5afa2df59cf4bb0fab4a8dedab256fc1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ff993dd4436592fd8694f8459760d4a3.png)
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【推荐3】以x为自变量的两个函数y与g,令
,我们把函数h称为y与g的“相关函数”例如:以x为自变量的函数
与
它们的“相关函数”为
.
恒成立,所以借助该“相关函数”可以证明:不论自变量x取何值,
恒成立.
(1)已知函数
与函数
相交于点
、
,求函数y与g的“相关函数”h;
(2)已知以x为自变量的函数
与
,当
时,对于x的每一个值,函数y与g的“相关函数”
恒成立,求t的取值范围;
(3)已知以x为自变量的函数
与
(a、b、c为常数且
,
),点
,点
、
是它们的“相关函数”h的图象上的三个点,且满足
,求函数h的图象截x轴得到的线段长度的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/94c7db5b3f8d6506d4f9e7a297da7884.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/344ccbf79da6ad7e3709d6fa72efb756.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9fc92af92640a58f338bfa22e109ef24.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/16e3e36b9b5eedd3368b5ae56b09cbd5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c3b9097314c44d53e806bfa5f8455a23.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d5f05e56f1a32f767cbbabf64846f0d4.png)
(1)已知函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1a5bd57912b194186fb5cbe63ed24861.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/846c1c3aaf1191afe5479d0b39555244.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6d0d32ea3bbad35e0af9ecff1c62d044.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0af3998f92f891e8fcbd2a3d9c455051.png)
(2)已知以x为自变量的函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/876dec032123d30141f222213ceb337a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/147696ec20c375b8ef1bac64e8353523.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0fde64f4d3c38e43fbdee24eadc4b0dd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c624ba61a6885c1b81ec8d6c9307ecfe.png)
(3)已知以x为自变量的函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a90385c676848de67293e3ed6bc000fe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/923e9664cab9e8f7c094cbb1c0de27d4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/94440d3e4c073f94f2b266ff99d50e74.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b03b011f69dfc5262a3d82f64676739b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5c62afde299d4b4c4a883c83f71950f3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/45895a7394375a26a3ad9ed3a86be07c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fb801410d3104a32ae1f53a7049eee92.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4d79ff3f2842d292a6cc6e33629a62b5.png)
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解答题-问答题
|
较难
(0.4)
名校
【推荐1】在平面直角坐标系
中,正方形
中
,
,
,
.给出如下定义:记线段
的中点为
,当点
不在正方形
上时,平移线段
,使点
落在正方形
上,得到线段
(
,
分别为点
,
的对应点).线段
长度的最小值称为线段
到正方形
的“平移距离”.
(1)已知点
的坐标为
,点
在
轴上.
①若点
与原点
重合,则线段
到正方形
的“平移距离”为______;
②若线段
到正方形
的“平移距离”为2,则点
的坐标为______;
(2)若点
,
都在直线
上,
,记线段
到正方形
的“平移距离”为
,求
的最小值;
(3)若点
的坐标为
,
,记线段
到正方形
的“平移距离”为
,直按写出
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ee31829d0d4d5f779a957d7df8058ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/389bc3f29c058067e06e0d0d2be399da.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e584f799ea554fc5533925ead4672501.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f5efb4b7f24d2a31e2d70c927a692d75.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fbec2b399dca73cf28e33ec10b7a347f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/12675b38cf628368b125710787da40b7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/389bc3f29c058067e06e0d0d2be399da.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/389bc3f29c058067e06e0d0d2be399da.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bb0628cecbfc98d390e5447d52414e8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7c314398e26ffc7164b82946eeb4273.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3953cec61ac602ce5eb59b7912352179.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6024fd4532f5f981deac4582c799a6ef.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/389bc3f29c058067e06e0d0d2be399da.png)
(1)已知点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a2a5e336b6bcba6354fd366c892dd06.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
①若点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/389bc3f29c058067e06e0d0d2be399da.png)
②若线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/389bc3f29c058067e06e0d0d2be399da.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
(2)若点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fceb9eb57ca36db386ffafeda213599c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fcd0ced286a0fbc7e4862f8147264277.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/389bc3f29c058067e06e0d0d2be399da.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5edf900c810371fb21297c15f86d8743.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5edf900c810371fb21297c15f86d8743.png)
(3)若点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/29bb7ff5012ac35f2e5fa64b0247ce93.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fcd0ced286a0fbc7e4862f8147264277.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/389bc3f29c058067e06e0d0d2be399da.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b31ac1def558351e2e3ed1235c570530.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b31ac1def558351e2e3ed1235c570530.png)
![](https://img.xkw.com/dksih/QBM/2021/10/11/2826858197598208/2832054640427008/STEM/5ee858b2-6faa-4e2f-8f21-765a180da5e7.png)
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解答题-证明题
|
较难
(0.4)
名校
【推荐2】学完勾股定理的证明后发现运用“同一图形的面积不同表示方式相同”可以证明一类含有线段的等式,这种解决问题的方法我们称之为等面积法.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/11/11/b7947f0b-65f7-4b9f-bb18-365b9cacafa7.png?resizew=424)
(1)【学有所用】如图1,在等腰
中,
,其一腰上的高
为h,M是底边
上的任意一点,M到腰
、
的距离
、
分别为
、
,小明发现,通过连接
,将
的面积转化为
和
的面积之和,建立等量关系,便可证明
,请你结合图形来证明:
;
(2)【尝试提升】如图2,在
中,
,D是
边上一点,使
,过
上一点P,作
,垂足为点E,作
,垂足为点F,已知
,
,求
的长.
(3)【拓展迁移】如图3,在平面直角坐标系中有两条直线
,
,若
上的一点M到
的距离是2,求
的值.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/11/11/b7947f0b-65f7-4b9f-bb18-365b9cacafa7.png?resizew=424)
(1)【学有所用】如图1,在等腰
![](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/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9ce6c0e9de83f2e64ae33609fc08459d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/907d5147cea4c9ce855074864fe54506.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/80b53eab97158937f92039c1e133b0f1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f285174fbf90a9742de57c1e53224cff.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d50703c46b6153945d718b198f03b4b5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20a5e0a51c9e14fb246b0ba0b231c1e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dddb32a7a5c157fdf8aa049b2d665b4c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e660d043e852098c6acc1c10b073dbe6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e660d043e852098c6acc1c10b073dbe6.png)
(2)【尝试提升】如图2,在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8f89deb952f57f4b3fa4887b098b7b91.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/532aece6cfd67e2a97977eed978dbf2b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/04fb30a9d07e410ac92c34b8ad0133db.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/544204617f1eb4e26a082a72d27d0bde.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c406e7d1e7977dd5b30ef81cfdc8e8d2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad3f1d2807be6d574e04ca9c6e721b22.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3bce17597a7a6a83cd4287d424db6b56.png)
(3)【拓展迁移】如图3,在平面直角坐标系中有两条直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d66895b91dac177b85689a97536121d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1a92f324a85712cd1e0d5f242a87bc2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f6f17bc385bafb37e8f964e5eb99cd0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e9b0f5f44abbc6544a2f672b025b013.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/50b0b858bc8fe8b2737b2febc1b3ce56.png)
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