已知平面直角坐标系内三点A、B、C在一条直线上,满足
,
,
,且
,其中O为坐标原点.
(1)求实数m、n的值;
(2)若点A的纵坐标小于3,求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e3c891517cec4a5b39662dcbc20fe4a2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aa3051eeddb78791be30e5417f2683c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e695709eea00dc57c38bc122fb8d4346.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2bfe4da6f357e55927d25d9d27ea8717.png)
(1)求实数m、n的值;
(2)若点A的纵坐标小于3,求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4444247d28935239ed05d0e9a1adb0a3.png)
更新时间:2021-07-13 15:09:39
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【推荐1】(1)已知
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为何值时,
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(2)已知向量
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、
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能构成三角形,求实数
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(2)已知向量
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5523da728d8e8d2a1a0b8a730492974c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8459b7d058bb087f75e52dcb939ac559.png)
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(3)已知向量
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e438e7a8fb34e75e624c3bb40d2afde.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/433b94c39737727e53468df419d8314a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5356fac8b160d1a24b63da3f65293d5f.png)
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【推荐2】已知点
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f9c59f0e35b7ae5206e45878934482b8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7d070a64de8480a0f70a49e447574b9a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
(1)若
![](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/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e2b83beedb3438153e6f728545fe3e03.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
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【推荐1】已知复数
满足
,且z的虚部为
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在复平面内对应的点在第四象限.
(1)求
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(2)若
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e81e59019989b7dc2fb59b037ef6e010.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eb090b953f6f77df60ce6b8addfb4da9.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e81e59019989b7dc2fb59b037ef6e010.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e81e59019989b7dc2fb59b037ef6e010.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e81e59019989b7dc2fb59b037ef6e010.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01ea3cc01ce7266cdf0fd73fd50d23c8.png)
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解题方法
【推荐2】已知复数
,
,
,它们所对应的点分别为
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、
,在复平面上构成一个正方形的三个顶点.
(1)画出示意图,验证说明
;
(2)求这个正方形的第四个顶点对应的复数.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/db04f988e1aba18b0a3470d332908c15.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/70ae34624f8f116b37c06560710e63fe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4ea8640c311d5f7d3c94cf817b332ad8.png)
![](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)
(1)画出示意图,验证说明
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/080db3af81b29ed10144a1c2e2a4fb8a.png)
(2)求这个正方形的第四个顶点对应的复数.
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【推荐1】已知梯形
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![](https://img.xkw.com/dksih/QBM/2021/4/20/2704057702531072/2709817579495424/STEM/0f8e220ab68b4237a36b21507ca6b289.png?resizew=145)
(1)求
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(2)求
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夹角的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9060f03b9ee41d70d135b1e1a8902ce9.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d0d5a2cd05e4476fc72271e8fdb59a9a.png)
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(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/afd65609914b0e8771fc9a8979d54af1.png)
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bfd0cecf5c102254b9755e42a80c3948.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be64d59ac6538a0f4d79fb825e082081.png)
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【推荐2】O是平面直角坐标系的原点,
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,记
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.
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(2)若四边形
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ee9c730266ecf448c14608e24d37b986.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/049131856ba841523793ee3d83099014.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cb80eb942aafb194fadc473776f35b1d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/433b94c39737727e53468df419d8314a.png)
(2)若四边形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3241d7fedd89d85711acd7a2635298af.png)
(3)若向量
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9fee2c7a138674456201ff08eea5180a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/22945ece4d423c9bdc243a46a7a89a48.png)
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【推荐3】已知
,
,求
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/10794c9dac9d66e16d7509d3f6f0a41d.png)
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