抛物线
(
,
为常数,
)顶点为
,与
轴交于点
,
(点
在点
左侧),与
轴交于点
,直线
过点
且平行于
轴,
为第一象限内直线
上一动点,
为线段
上一动点.
(1)若
,
.
①求点
和点
,
的坐标;
②当点
为直线
与抛物线的交点时,求
的最小值;
(2)若
,
,且
的最小值等于
时,求
,
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bc5ccf9df767bb1f45c668bf4bc6df87.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/8cec12441802f71e803efaf2c62ee588.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.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/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03837b3769eda7f0d3804cc5ad4a6d60.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dcb5bac75f36bb1dc5c8190d4dbe681d.png)
①求点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
②当点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eef7afc34443473b44d781a5d06bff02.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20a7847bff0073127f10ec3925127414.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/011f66c884442a8fc55829d46c71924d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/41322821ce31416fdac8dd6e0aa41c71.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/071a7e733d466949ac935b4b8ee8d183.png)
2024·天津·一模 查看更多[1]
更新时间:2024-05-25 20:26:00
|
相似题推荐
解答题-证明题
|
较难
(0.4)
【推荐1】如图,在
中,
,
,点E为边
上一动点(不与点A,C重合),延长
到点F,使
,过点F作
于点G,交
于点H.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/11/19/e89db430-2b44-4157-b99a-22ac7d5caf4f.png?resizew=202)
(1)当
时,求
___________;
(2)连接
,设
.
①证明:
;
②
能否为等腰三角形?如果能,求此时
的值;如果不能,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9c06154cae3bf7a8ce5a1e97a7380875.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/047dc9795efa99b6fb9fdf9778085dab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9abaeba15f3abdd877bc701af52c5cd9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2ac3d3b55561ec5d4acc242ecd1c7f41.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/51246bfbcf524ed6da2eceec37712470.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/11/19/e89db430-2b44-4157-b99a-22ac7d5caf4f.png?resizew=202)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ebb738130d1a51b71c2f5d13f26d222.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2485b9b0a8f7703bcfa69f160c540a9f.png)
(2)连接
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/589786dd7c3a2679c3230b671cd232d6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3160d33de228937b8a691519fced22e7.png)
①证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e28a0e68f2afe3b31c9b6c17f9d7b811.png)
②
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0bc5c12b241539cc99487865f7d8bf34.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
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【推荐2】如图,
为正方形
对角线
上一动点,若
,
的最小值是多少?
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fcd0ced286a0fbc7e4862f8147264277.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/643bd6c1545b531e70f05913dc28bda0.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/13/af314538-16c1-4320-b3d6-f4bd0f071dd9.png?resizew=110)
您最近一年使用:0次
解答题-证明题
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【推荐1】如图1,
,
与直线
,
相交,点
为直线
、
之间的一点.
(1)若
,
,求
的度数;
(2)如图2,在(1)的条件下,
平分
交
于点
,
平分
交
于点
,猜想
的结果并证明你的结论;
(3)如图3,在(1)的条件下,点
是射线
上一动点,作射线
并在射线
上取一点
,使得
,再作
的平分线交直线
于点
,则当
点在射线
上移动时,
的大小是否变化?若不变,请求出
的大小;若变化,请求出其变化范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b0fff774b4b0087a6f304ce930d359be.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.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/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/9/22/d17eb756-a8f4-49e3-a9a6-84d511ed1728.png?resizew=531)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/64093789e118804b716d199e78a85005.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b7151e1818a644d1fdb792c8f0fafac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/19768d8c55deb4973820aeab7a224e6a.png)
(2)如图2,在(1)的条件下,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b46c607b3deac746c0ef3389ad8f65c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7d31cb19d4833eec524dc1d0bfdf97fc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fb26d84907c923278ac4626a9d58947.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1460aa3d83df61f6c411b34412135451.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6cf0f03734e0d7e4de1d02f2e99b5124.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fc5adb5eb60ae4435a12d93854066298.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/71ecd1bc6374d41b53c29fd4ffe35f97.png)
(3)如图3,在(1)的条件下,点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf3834d7ec7531f3c3c0ce9b286f7a49.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1642eec556eb252de9c1ab7bb5ca90b3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/65bb1c5af4c7a9376882867e07690b18.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/65bb1c5af4c7a9376882867e07690b18.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5631a5a858720b0797c0b9e60d5c37ca.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fd00e6b7626ee3fe3d9e59faacb58849.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/91f3956f008cc29ca4bae44a087d5427.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf3834d7ec7531f3c3c0ce9b286f7a49.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1642eec556eb252de9c1ab7bb5ca90b3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/74299e0d10eb2e529628daf5e5b2cba2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/74299e0d10eb2e529628daf5e5b2cba2.png)
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解答题-证明题
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(0.4)
【推荐2】【阅读理解】倍长中线是初中数学一种重要的数学思想.小聪在学习过程中,遇到这样一个问题:如图,
中,
,求
边上的中线
的取值范围,经过和小组同学的探讨,共同得到了这样的解决办法:延长
到点E,使
.请根据小聪的方法解决以下问题:
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/3/214151a7-099b-447b-87d4-07e30f6d82a0.png?resizew=107)
(1)求得
的取值范围是___________;
【问题解决】请利用上述方法(倍长中线)解决下列三个问题
如图,已知
,
,P为
的中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/3/c25bf549-a3ba-47d9-a6ab-8b3be64f0f21.png?resizew=592)
(2)如图1,若A,C,D共线,
,
,求四边形
的面积;
(3)如图2,若A,C,D不共线,
,求证:
;
(4)如图3,若点C在
上,记锐角
,且
,则
的度数是______.(用含α的代数式表示)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e428e7a09732be85c1224e9c8f6a71c5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b3236a994c6824f17bb333112fcc0072.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/88929f4ba0851730d5f941d426b87548.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e491964b08c1ab19a71bc1b04dfe2b3e.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/3/214151a7-099b-447b-87d4-07e30f6d82a0.png?resizew=107)
(1)求得
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
【问题解决】请利用上述方法(倍长中线)解决下列三个问题
如图,已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aabd1d9b7e7f7ecb788ff542218af2b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6efe84108332902e4b83e8a0df44a89e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d0213c5787a5a6b38d11bceca5567f67.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/3/c25bf549-a3ba-47d9-a6ab-8b3be64f0f21.png?resizew=592)
(2)如图1,若A,C,D共线,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2f2f4633042563b945119f48776e39d5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/917b2c712eaf054c1ce3cc1a852a1b8b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1394e4f95b177943f6040f242c5b2212.png)
(3)如图2,若A,C,D不共线,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a69011c4e61e876af77991f8f483f01.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ee730f6a2551fb1b582ecf290cfea233.png)
(4)如图3,若点C在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d0213c5787a5a6b38d11bceca5567f67.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cb2cf0e95fdf1fd8a5b01d3dfd905e08.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c576868ea71fffd5457059df1adb76f8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9087808b4f50704c5ad4ce26c719c4ff.png)
您最近一年使用:0次
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|
较难
(0.4)
【推荐3】概念学习
规定:如果一个三角形的三个角分别等于另一个三角形的三个角,那么称这两个三角形互为“形似三角形”.
从三角形(不是等腰三角形)一个顶点引出一条射线与对边相交,顶点与交点之间的线段把这个三角形分割成两个小三角形,如果分得的两个小三角形中一个为等腰三角形,另一个与原来三角形是“形似三角形”,我们把这条线段叫做这个三角形的“形似分割线”.
![](https://img.xkw.com/dksih/QBM/2022/11/3/3101804358778880/3105077565317120/STEM/8f9b66b7bd5c4f3c87cc79c0fefdfa2e.png?resizew=370)
理解概念:
(1)如图1,在
中,
,
,请写出图中的“形似三角形”(写出两对即可).
(2)概念应用:如图2,在
中,
为角平分线,
,
.求证:
为
的形似分割线.
(3)在
中,若
,
是
的形似分割线,直接写出
的度数.
规定:如果一个三角形的三个角分别等于另一个三角形的三个角,那么称这两个三角形互为“形似三角形”.
从三角形(不是等腰三角形)一个顶点引出一条射线与对边相交,顶点与交点之间的线段把这个三角形分割成两个小三角形,如果分得的两个小三角形中一个为等腰三角形,另一个与原来三角形是“形似三角形”,我们把这条线段叫做这个三角形的“形似分割线”.
![](https://img.xkw.com/dksih/QBM/2022/11/3/3101804358778880/3105077565317120/STEM/8f9b66b7bd5c4f3c87cc79c0fefdfa2e.png?resizew=370)
理解概念:
(1)如图1,在
![](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/8b757f0c42ae5c9a2d6a4b19e5877b27.png)
(2)概念应用:如图2,在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8117b8e89b9aa4ed51fbaa8df8381c25.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f51e114946a52a5621d4e9b73165fa28.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
(3)在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d545cb81edcdaf8c267bc4b3f19c53ef.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8fabb884dc5f9609de491245463bbe9a.png)
您最近一年使用:0次
解答题-计算题
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(0.4)
解题方法
【推荐1】(1)【发现】如图1,在
中,
分别交
于
,交
于
.已知
,
,
,求
的值.
思考发现,过点
作
,交
延长线于点
,构造
,经过推理和计算能够使问题得到解决(如图2).
![](https://img.xkw.com/dksih/QBM/2020/5/21/2467719840530432/2468717774872576/STEM/1a6e292a-9322-449d-acf0-d435a5773fec.png)
请回答:
的值为______.
(2)【应用】如图3,在四边形
中,
,
与
不平行且
,对角线
,垂足为
.若
,
,
,求
的长.
(3)【拓展】如图4,已知平行四边形
和矩形
,
与
交于点
,
,且
,
,判断
与
的数量关系并证明.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/95a078495ba47076ccaa28b46f765d80.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.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/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b0a0d2a2415ec1e1374ac46bc232f450.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/55c24a968c73e960698a572ab01e3698.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1d2231c7a2875ab6d423dff3ead4069.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0c69d0869f9b844a95ea8e16fee366f0.png)
思考发现,过点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/70099a8a0e7cff25485a63e8811a6aab.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/5f2ea13010e2399194be2a681310543e.png)
![](https://img.xkw.com/dksih/QBM/2020/5/21/2467719840530432/2468717774872576/STEM/1a6e292a-9322-449d-acf0-d435a5773fec.png)
请回答:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0c69d0869f9b844a95ea8e16fee366f0.png)
(2)【应用】如图3,在四边形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5f79863ffcfa63117ca6741b20a48e69.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e8d2530e7023b2345c651e8f53629ff1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cfc1f76257275ab4b04f9bc913535670.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/55c24a968c73e960698a572ab01e3698.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9f08273d339dc5ddbb89aa67bb8205e6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/59f7abf31402fcfd6f86fb434adc37d1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
(3)【拓展】如图4,已知平行四边形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2dde327febef2331a4766a79b433cc02.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d004d2d115b477ade6af7ddb93db0df8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2bc2365bf5abb74954411eace3fd1abc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/019e6026da0b4c908b4d2b9e6a84c375.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/560daab15f80ef8171d6fef75042921d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d004d2d115b477ade6af7ddb93db0df8.png)
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解答题-证明题
|
较难
(0.4)
【推荐2】如图,在△ABC中,AB=AC=7,BC=5,将△ABC绕点C旋转,使得点D落在AB边上,点A落在点E处,连接AE.
(1)求证:四边形ABCE是平行四边形;
(2)求△AFE的面积.
(1)求证:四边形ABCE是平行四边形;
(2)求△AFE的面积.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/11/29/3eb135f6-5912-4c56-affd-29d2694db34e.png?resizew=131)
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解答题-问答题
|
较难
(0.4)
【推荐1】已知抛物线
(
,
是常数,且
),经过点
,
,与
轴交于点
.
(Ⅰ)求抛物线的解析式;
(Ⅱ)若点
是射线
上一点,过点
作
轴的垂线,垂足为点
,交抛物线于点
,设
点横坐标为
,线段
的长为
,求出
与
之间的函数关系式,并写出相应的自变量
的取值范围;
(Ⅲ)在(Ⅱ)的条件下,当点
在线段
上时,设
,已知
,
是以
为未知数的一元二次方程
(
为常数)的两个实数根,点
在抛物线上,连接
,
,
,且
平分
,求出
值及点
的坐标.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63d8de071a9c22c96a59b172d76c127e.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/20849c00c47cbdc43f18d53341b6c4e5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0929421a6188c3122442866b0b85a5e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08ef03f452410ab19c6246567c427178.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
(Ⅰ)求抛物线的解析式;
(Ⅱ)若点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6b1bd1adfe4cc6566218f19970c2fd3b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73465a1f9aa03481295bf6bd3c6903ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a5f1641947153c80b987320885a2b57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5c02bc0c74292b1e8f395f90935d3174.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5c02bc0c74292b1e8f395f90935d3174.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
(Ⅲ)在(Ⅱ)的条件下,当点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/715b64507ce547fedeaf2e27e386b267.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5c02bc0c74292b1e8f395f90935d3174.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/168b3e4b1d6f04226fa2687a72a268b4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e81e59019989b7dc2fb59b037ef6e010.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/89aa3885df3007f836123e80a123a462.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2dca049735b45fb9b2533c68605eddc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83042953e7f15e984b2da2ee9ca678d1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/892909e49156f7dcc0650fcd65243877.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/438f34bc8b04e8c494b91306ac6fe352.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8fe51e6b87b34d63e797f853a6acf11c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
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解答题-问答题
|
较难
(0.4)
名校
【推荐2】定义:平面直角坐标系中有点
,若点
满足
且
,则称
是
的“
界密点”.
(1)①点
的“
界密点”所组成的图形面积是__________;
②反比例函数
图象上__________(填“存在”或者“不存在”)点
的“
界密点”.
(2)直线
经过点
,在其图像上,点
的“
界密点”组成的线段长为
,求
的值.
(3)关于
的二次函数
(
是常数),将它的图象
绕原点
逆时针旋转
得曲线
,若
与
上都存在
的“
界密点”,直接写出
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d0b6c61eada8be8daf29cf05699e2afc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/174861299cb1b64e5304c25c70eb216f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/84f7690621e9cfbc09f6962b89e0b6f6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b5e8289f7b9c6b7061d0ee73f8b1176.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
(1)①点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a23c4d7c41b89ed396a5189fd6ed3536.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61128ab996360a038e6e64d82fcba004.png)
②反比例函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/498bcfd1aac03057dcd0adef2dd113a3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f77ba8b3cb02c27e2a207a27a5f77701.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdaa19de263700a15fcf213d64a8cd57.png)
(2)直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0e114459637a3db306e91b5e9ee9aae8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5281c7f1b62abbcb3939e80379eaed78.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a5b39f102a547d063e5a1a92666a555c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61128ab996360a038e6e64d82fcba004.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e20838e72faf737614d76fcee82ab6c5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
(3)关于
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3bc49c103937c59ee75ae5dd9308a372.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c02b54dc6b3e1bb6544f47d4c8743fcf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0c88d9142df6ba8e43c1a93bd04a1362.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0c88d9142df6ba8e43c1a93bd04a1362.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f77ba8b3cb02c27e2a207a27a5f77701.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdaa19de263700a15fcf213d64a8cd57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
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