已知直线上两点,求直线的斜率,并判断其倾斜角是锐角还是钝角:
(1)
,
;
(2)
,
.
(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/da927eda15e4af160175ce6136f0404e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3db929f14e1fe2c41740a1f2552894d5.png)
(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/40dff4bbd58a9c17e0e4994e91dfb2b4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3523ad2994c6452ca643e9d3fe740470.png)
23-24高二上·全国·课后作业 查看更多[2]
更新时间:2023-09-11 15:54:00
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【推荐2】已知直线
:
的倾斜角为
.
(1)求a;
(2)若直线
与直线
平行,且
在y轴上的截距为-2,求直线
与直线
的交点坐标.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e9b0f5f44abbc6544a2f672b025b013.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/21ab0802ba430a49f66d35757a14cd22.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/79a97bb4dcfab4ec7539bc783d563c49.png)
(1)求a;
(2)若直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f6f17bc385bafb37e8f964e5eb99cd0.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/3f6f17bc385bafb37e8f964e5eb99cd0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1f0d606e9b87defe06038ca57b5f38d1.png)
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【推荐1】已知三角形
的顶点坐标为
,
,
,
是
边上的中点.
(1)求
边所在的直线方程;
(2)求中线
的方程.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8a4769c5722a752ca298065a892aaec3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a2642ee408c474dbf0554d7c85dec140.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/31876cb90b901957e53be8526edfadcc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/00a28be4d5a16cf245f6fa7c4088fee4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
(2)求中线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d50703c46b6153945d718b198f03b4b5.png)
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【推荐2】如果三点A(2,1),B(-2,m),C(6,8)在同一条直线上,求实数m的值.
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