根据下列条件,写出直线方程的一般式:
(1)经过点(0,2),且倾斜角为
;
(2)经过点(-2,3)和点(-1,0);
(3)经过点(2,1),在x,y轴上有不为0且相等的截距.
(1)经过点(0,2),且倾斜角为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2d88591679796c52024d11c4de641bdb.png)
(2)经过点(-2,3)和点(-1,0);
(3)经过点(2,1),在x,y轴上有不为0且相等的截距.
21-22高二·全国·课后作业 查看更多[3]
更新时间:2022-03-05 10:38:03
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【推荐1】先判断下列命题的真假,如果是假命题,就括号部分的结果进行改正
(1)若
,
共线,则(
)
(2)经过两点
的直线方程为(
)
(3)经过点
,倾斜角为
的直线方程为(
)
(4)截距相等的直线都可以用方程(
)表示
(5)在空间中,直线
的方向向量
,平面
的一个法向量
,若
则(
平面
)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f9795e7f5cb9b366776c41d8f3f43942.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c3ed9c2e9fabbfc63733bae8fa079d00.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/10df84d553a8826a7ce9bff4bf0d95b9.png)
(2)经过两点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/771a1341eed7e8c04fa8432aa9d77517.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7d719138091c843fed7ec6fd6f14efac.png)
(3)经过点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/abc095361d36bbfb29a38fbdf5f21d33.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c24095e409b025db711f14be783a406c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5c8ecfb8dfad67ca567f8bb1a1ca8a09.png)
(4)截距相等的直线都可以用方程(
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/087af7a99d3e752994c8081970f5050d.png)
(5)在空间中,直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cb80eb942aafb194fadc473776f35b1d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36f1a8e551cba7ec9f451749f60e628d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/516c9750b593ab00666ea4ec2730df2d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/93a4afe69e9ee3c701f1f109c3a0a7d4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
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【推荐2】圆
内有一点
,过点
作直线
交圆
于
,
两点.
(1)当直线
的倾斜角为
时,求弦
的长;
(2)当弦
被点
平分时,写出直线
的方程.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7544661110f2fa5eda818b897d0f0647.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2007972af3341f27fbc32ce62dfce5e2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](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/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
(1)当直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/79a97bb4dcfab4ec7539bc783d563c49.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
(2)当弦
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
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【推荐1】在
中,已知
的平分线所在的直线方程为
.
(1)求点
的坐标;
(2)求
的面积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6b3ec97ba805c65748ce293a1994aa1e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/19e5297d33dec230ae1205d7fe52821d.png)
(1)求点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
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【推荐2】已知
的三个顶点分别为
,
,
.求:
(1)边
所在直线的斜截方程;
(2)求
的面积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2ee80939187a84e1863eeb192a301c29.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aaf8f5d8be251bf2848d6d10aa0340f9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/25e92800c8a8cf3ab792ab9e61b8fb35.png)
(1)边
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
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【推荐1】
城市要在某小区前一块广场
(如图)上规划出一块长方形地面(不改变方位),改善人们室外活动生活.问:如何设计才能使开发面积最大?并求出最大面积.(已知
,
,
,
)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73465a1f9aa03481295bf6bd3c6903ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9142a8490de14a87eda628ffa7e28982.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6347b78e0ec9bd02f99fa676a679153c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/da0467d0f0d475035a626bbc87d97661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d68fe5a6e4e0e23da5429abc5564609f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9555b1ec17887ab142d349d48246af02.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/2/a8d9f07d-5862-4024-a676-b125ca63392b.png?resizew=128)
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【推荐2】已知直线
过点
.
(1)若直线
在两坐标轴上的截距互为相反数,求直线
的方程;
(2)若直线
的斜率
,当
与两坐标轴的负半轴所围成的三角形面积最小时,求直线
的方程.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/113c78139e26ed8a7d7280ae1bf8d6a0.png)
(1)若直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.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/44a4eaa80b44625890339d6a0065c241.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
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【推荐1】在平面直角坐标系
中,已知直线
的斜率为
.
(1)若直线
过点
,求直线
的方程;
(2)若直线
在
轴、
轴上的截距之和为
,求直线
的方程.
![](https://img.xkw.com/dksih/QBM/2016/12/28/1826264082841600/1826264082931712/STEM/f80c93d717da45c3bf1c3aa892cc37ad.png)
![](https://img.xkw.com/dksih/QBM/2016/12/28/1826264082841600/1826264082931712/STEM/9d9a7c91a9d74215b81cef831469b30c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
(1)若直线
![](https://img.xkw.com/dksih/QBM/2016/12/28/1826264082841600/1826264082931712/STEM/4dee0b03b8e8463a854fcf1460066ea9.png)
![](https://img.xkw.com/dksih/QBM/2016/12/28/1826264082841600/1826264082931712/STEM/69e9572c3a3046dd863868da19b3a398.png)
![](https://img.xkw.com/dksih/QBM/2016/12/28/1826264082841600/1826264082931712/STEM/9d9a7c91a9d74215b81cef831469b30c.png)
(2)若直线
![](https://img.xkw.com/dksih/QBM/2016/12/28/1826264082841600/1826264082931712/STEM/9d9a7c91a9d74215b81cef831469b30c.png)
![](https://img.xkw.com/dksih/QBM/2016/12/28/1826264082841600/1826264082931712/STEM/cb65fbff70b344c38bf9440ba93c58fb.png)
![](https://img.xkw.com/dksih/QBM/2016/12/28/1826264082841600/1826264082931712/STEM/c81ce49c59444fa59a980950269cc02b.png)
![](https://img.xkw.com/dksih/QBM/2016/12/28/1826264082841600/1826264082931712/STEM/9460c323f6b4418b92e15639916aff82.png)
![](https://img.xkw.com/dksih/QBM/2016/12/28/1826264082841600/1826264082931712/STEM/9d9a7c91a9d74215b81cef831469b30c.png)
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【推荐2】已知
为直线
的方向向量,
,A为MN的中点.
(1)求出点A的坐标;
(2)若直线
过点A,且在y轴上的截距是在x轴上的截距的
,求直线
的方程;
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4ebf9f9e6000eb9d82df1cb0d9da59e1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f4690597bc0883f8932494c135a11433.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b58a3303de5dbcf8ae994eacc2a98cd.png)
(1)求出点A的坐标;
(2)若直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/13dea1bd3d0dd84b8b6f6ff634c5600c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f89eef3148f2d4d09379767b4af69132.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/13dea1bd3d0dd84b8b6f6ff634c5600c.png)
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