在平面直角坐标系
中,直线
,
,
,
,
(
).
(1)证明直线
和
过同一个定点
,并求
到直线
的距离
;
(2)若
与
交于
点,
与
交于
点,记
,
,求
的最大值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ee31829d0d4d5f779a957d7df8058ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/662ce2fa01b82f84c730d11afc6000dc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f49d9c3013da5e3c3a54c0decb56c33.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09105430634bbf0b5ff6ea0f126fb3a9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d23314be1762a3e81b64855d81e7c71.png)
(
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ed0e33ce86afd345af341c43693b99c7.png)
(1)证明直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c9fce9427c9b17e4d3cda0c3ff3e2e14.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d7f2813ee8f26cca880b6427f5f545d0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e9b0f5f44abbc6544a2f672b025b013.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/892909e49156f7dcc0650fcd65243877.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e9b0f5f44abbc6544a2f672b025b013.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c9fce9427c9b17e4d3cda0c3ff3e2e14.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f6f17bc385bafb37e8f964e5eb99cd0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d7f2813ee8f26cca880b6427f5f545d0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b05bf23fc23d66e05af9eb79a7a7d17.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bf3614b34fdc6fda470179e84cc1f693.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5224a7da7fe6bc28971ce4c277f88588.png)
2021高二·江苏·专题练习 查看更多[1]
(已下线)专题12 《直线与方程》中的定点问题-2021-2022学年高二数学同步培优训练系列(苏教版2019选择性必修第一册)
更新时间:2021-09-04 14:15:17
|
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适中
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解题方法
【推荐1】已知函数![](https://staticzujuan.xkw.com/quesimg/Upload/formula/981eb9fe8672512683111ad1dfada520.png)
(1)若
的最大值和最小值;
(2)若
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/981eb9fe8672512683111ad1dfada520.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/321dfb0112ce709dda4f299c06ae010e.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3161fc160bfbb4ba2479aa13499d5ef0.png)
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【推荐2】已知函数
.
(1)求
的单调递增区间;
(2)求
在区间
上的最小值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/70d918456c026d9a3f314018f050485d.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e8351f28159f280d1bfe3edb75a3a5e0.png)
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【推荐1】已知
,直线
和直线
相交于点P,
和y轴交于点A,
和x轴交于点B.
![](https://img.xkw.com/dksih/QBM/2020/11/25/2600466323546112/2606063756967936/STEM/3f5e2e843c624ab497fb653553f7dc7e.png?resizew=161)
(1)判断
与
的位置关系,并用t表示点P的坐标;
(2)求
的长度的取值范围,并指出取最值时点P的位置.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/738370de535f7375ae58c72f18bdceef.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08937cea047dcf38b1c4ccdbc94e54ba.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f37c3d9a98ced1ff2dfbebaa0b1e00d6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e9b0f5f44abbc6544a2f672b025b013.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f6f17bc385bafb37e8f964e5eb99cd0.png)
![](https://img.xkw.com/dksih/QBM/2020/11/25/2600466323546112/2606063756967936/STEM/3f5e2e843c624ab497fb653553f7dc7e.png?resizew=161)
(1)判断
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e9b0f5f44abbc6544a2f672b025b013.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f6f17bc385bafb37e8f964e5eb99cd0.png)
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8ae743852e53bb3a32144cfa423d2bf0.png)
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【推荐2】已知直线
,直线
,
,
与
交于点
.
(1)设
的轨迹为曲线
,求
的方程;
(2)证明:曲线
与圆
相交,并求它们的公共弦的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/74227ce264905db00136130d47b7b5c1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1c4f9f3eca272faebaf206cc88a54401.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/10bbdef421c976962a270a2beabbad91.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e9b0f5f44abbc6544a2f672b025b013.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f6f17bc385bafb37e8f964e5eb99cd0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
(1)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
(2)证明:曲线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eefebc1e98817bfe7e835da7a1a0d6c0.png)
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解答题-证明题
|
适中
(0.65)
解题方法
【推荐1】已知圆
:
,直线
:
.
(1)求证:直线
恒过定点;
(2)求直线
被圆
截得的弦最短时
的值以及最短弦长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54329a84abb204cecb237b2bf2ff2bb7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85bc1c5ec31cf3b832d7f76a7edbefd8.png)
(1)求证:直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
(2)求直线
![](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/f0a532e15e232cb4b99a8d4d07c89575.png)
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【推荐2】已知直线l:
和圆C:
.
(1)求证:直线l恒过一定点M;
(2)试求当m为何值时,直线l被圆C所截得的弦长最短;
(3)在(2)的前提下,直线l'是过点
且与直线l平行的直线,求圆心在直线
上,且与圆C相外切的动圆中半径最小的圆的标准方程.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2eaa34e15d7ca9eb4b10987505bed64c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e257606e06cbc6cfb4701c0aeb5d5c8a.png)
(1)求证:直线l恒过一定点M;
(2)试求当m为何值时,直线l被圆C所截得的弦长最短;
(3)在(2)的前提下,直线l'是过点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/72ef0cc5999eecd066aee7730cc3e923.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/13dea1bd3d0dd84b8b6f6ff634c5600c.png)
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解答题-证明题
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【推荐1】已知平面上三点A,B,C.若该三点构成三角形,且
,建立适当的坐标系,用解析法证明:底边
上任意一点到两腰的距离之和等于一腰上的高.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bb5a4bf8028cee9396367b68ea8e6f80.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://img.xkw.com/dksih/QBM/2024/3/28/3463431210729472/3463547541331968/STEM/7e9ede75de1b4ba49ccbb757b1b83272.png?resizew=142)
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【推荐2】在平面直角坐标系
中,点
是曲线
上的一个动点.
(1)求点
的纵坐标
的最小值;
(2)求点
到直线
的距离的最小值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ee31829d0d4d5f779a957d7df8058ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f05616bd6fa88a792267570ac3e7e212.png)
(1)求点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/55986dde31c9ffbbd136b1430b1bf55e.png)
(2)求点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4f1a686b80b8f109a929f58c2de7201d.png)
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