解题方法
1 . 已知直线
过两直线
的交点
,
(1)若直线
与
垂直,求
的直线方程;
(2)若直线
交
轴、
轴分别是
点,
点是线段
的中点,求
的面积(O是坐标原点)以及
的直线方程.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c6001db9de776cb92686289b446c5829.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
(1)若直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b3f999bcdcdc1b9d56e0639cadd96dbd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
(2)若直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e52586ca2a3b783bc8092415e2d4bf6d.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/3fe95f656b98b53f71a9d72bf0c9a4b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
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解题方法
2 . 如图
是直线
在第一象限内的动点,过
作圆
的两条切线,切点为
,直线
交坐标轴正方向于
两点,则
面积的最小值是( )
![](https://img.xkw.com/dksih/QBM/2021/11/19/2854684251701248/2857008539418624/STEM/fda2816d-e297-41fc-bb28-e7b1e8a1261b.png?resizew=289)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60a7a0d98f3c4a14c2227ea02da0c5af.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/79382ba44ba669b5d43fdd5427adf16c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad056c25c0fdcbcc765eb5cbc6093f2b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01c74a907dda6bb7d9d56d009d9df253.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e2b83beedb3438153e6f728545fe3e03.png)
![](https://img.xkw.com/dksih/QBM/2021/11/19/2854684251701248/2857008539418624/STEM/fda2816d-e297-41fc-bb28-e7b1e8a1261b.png?resizew=289)
A.![]() | B.1 | C.![]() | D.2 |
您最近一年使用:0次
解题方法
3 . 已知直线
与两坐标轴围城一个三角形,该三角形的面积记为
,当
时,
的最小值是__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/65cf358c963d67e9bba28b607abc8821.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4a18735332a7dda88f8e35f5a8210d0d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3b0f4da30ea54b5b57e03e63b900bd2f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4a18735332a7dda88f8e35f5a8210d0d.png)
您最近一年使用:0次