已知直线
与圆
交于A、B两不同点,O是坐标原点,向量
、
满足
,则实数a的值是
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bd6e4185a3de5a361c4a87c62a770a8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a5f5d967ad135991b6075ee45df55643.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/858bf8324a9ea8db1a257714ff8afc01.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b3448a1728b998469d1fcaef320d68a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7552fe22f906104b7cb6b4dbc1475e2f.png)
A.±2 | B.2 | C.±![]() | D.-2 |
更新时间:2016-12-04 02:28:34
|
【知识点】 平面向量的应用举例
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【推荐1】
中,
,点
是边
的中点,点
在直线
上,且
,直线
与
相交于点
,则
为
![](https://img.xkw.com/dksih/QBM/2015/2/12/1571989392916480/1571989398544384/STEM/63a02686c5f24515957eced587e86601.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd936a2405709574af0a73543d94ad9c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7dfaed92cfec9d1a91c77af9af70a2ae.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6fd9e64ee4343ab3821894a253208a03.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6b1393ed272aa2f3d2ae8739a0afe3ec.png)
![](https://img.xkw.com/dksih/QBM/2015/2/12/1571989392916480/1571989398544384/STEM/63a02686c5f24515957eced587e86601.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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