在平面直角坐标系中,已知
的顶点
,
,
.
(1)求
边上的高;
(2)设点
是
平分线所在直线上的一点,若
,求点
的坐标.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6765a87bcc2b6d44aabdee9af73e6cd2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a26e951d6d2369e8da79a793a93a66a4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2fc27522334072c7f41cc482c1c67e9c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ea1a9821a00b71f6b7d7a76d91b3f810.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
(2)设点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2bc29145f6e7557711c34b443bd5e84.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/88be9946bb3c259c38fb75ff24842eed.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
18-19高一下·辽宁沈阳·期中 查看更多[2]
更新时间:2019-06-11 16:17:11
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【推荐1】请找3道几何题,分别写出几何方法和向量方法,并比较两种方法的差异.
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解题方法
【推荐2】已知
,
是
的中点
(1)若
,求向量
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(2)若
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e46a4e894ae759de1877c4d24cd135fd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad5d6ce9a749373db4996d7e6caac94.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/18acebeae8cc30bd05d6dfd5f0f2e737.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0e88bca29b1406f27f1913b7f25fb483.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d50703c46b6153945d718b198f03b4b5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fc95721fb35aa84eb969852a5e7a5139.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/721ed4ebca1b4223d382b6dc71ce0971.png)
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【推荐1】选修4-4:坐标系与参数方程
在直角坐标系
中,设
为
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上的动点,点
为
在
轴上的投影,动点
满足
,点
的轨迹为曲线
.以坐标原点为极点,
轴正半轴为极轴建立极坐标系,直线
的极坐标方程为
,点
,
为直线
上两点.
(1)求
的参数方程;
(2)是否存在
,使得
的面积为8?若存在,有几个这样的点?若不存在,请说明理由.
在直角坐标系
![](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/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08227ca941898eb34941f446ca8b1de8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.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/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bb5cd5b8378a2e1dd89264dfae48efdb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.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/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad88b2f7e3f145d74984e42939dcdd90.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0d4f6741b76e5243b516cb49f63d08ae.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/778836952ddbcb6e8d670f5b549c4fad.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
(2)是否存在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/62c7b00bbc388a57080f7dab4aca8286.png)
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名校
解题方法
【推荐2】已知
的三个顶点
、
、
.
(1)求
边所在直线的方程;
(2)
边上中线
的方程为
,且
,求点
的坐标.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1ff214d99784c6b23b7784bdaf3ed37a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b12be45c8f7097728ff623149f7abad.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d278ea203a0d8d6939d9a55e54f6fee0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9339c596729ec1a2fcf800d023358a7d.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
(2)
![](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/7371f6687bda2ddf410a739538f51e63.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a42bf9386ad23f37ec0052596378b056.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0914b68f106a912420705b2f3928ca42.png)
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