已知坐标平面内三点
.
(1)求
中AB边上的高所在的直线方程;
(2)若A,B,C,D可以构成平行四边形,且点D在第一象限,求点D的坐标.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b5d6700b7f09865dfb7d642cf346eb64.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
(2)若A,B,C,D可以构成平行四边形,且点D在第一象限,求点D的坐标.
更新时间:2022-09-29 09:19:40
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解答题-问答题
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较易
(0.85)
【推荐2】已知点
和点
是曲线
上的两点,且点
的横坐标是
,点
的纵坐标是
,求:
(1)割线
的斜率;
(2)在点
处的切线方程.
![](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/17d794141572c8b1e70957754f32b9eb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61128ab996360a038e6e64d82fcba004.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3edbd40e04e2a943051fa83d6e511add.png)
(1)割线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a5f1641947153c80b987320885a2b57.png)
(2)在点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
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解答题-问答题
|
较易
(0.85)
解题方法
【推荐2】如图是台球赛实战的一个截图.白球在
点处击中一球后,直线到达台球桌内侧边沿点
,反弹后直线到达台球桌内侧另一边沿点
,再次反弹后直线击中桌面上点
处一球.以台球桌面内侧边沿所在直线为坐标轴建立如图所示的平面直角坐标系.已知
,
.
![](https://img.xkw.com/dksih/QBM/2021/7/1/2754872792399872/2780215330521088/STEM/1ecd5ad9-6805-4445-8480-b614dd82b3fc.png?resizew=355)
(1)求直线
的方程;
(2)若点
的坐标是
,求
.
(提示:直线
与直线
的斜率互为相反数,
.)
![](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/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f9c59f0e35b7ae5206e45878934482b8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63d8f8f9a0d33fe55f7734f6278db6c0.png)
![](https://img.xkw.com/dksih/QBM/2021/7/1/2754872792399872/2780215330521088/STEM/1ecd5ad9-6805-4445-8480-b614dd82b3fc.png?resizew=355)
(1)求直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
(2)若点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4da935dce772e193b50f397c5c13d938.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/79b752f0f189e5d8666daea73e145dff.png)
(提示:直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3bdb3995265a321989202ff01001013d.png)
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