已知向量
,
,若
,则实数
的值为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9dde9cb3c2c078d44940f226ca200762.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0d99d783fd3bf6fa0aa7891c583a7e32.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1ad0959f7592c583b7f1a18575eb0163.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df64046e91b047037f19e4032e3b6de3.png)
A.![]() | B.![]() |
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更新时间:2023-03-25 10:18:22
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相似题推荐
单选题
|
适中
(0.65)
【推荐1】已知圆
的方程为:
,若直线
上存在一点
,使得在圆
上总存在不同的两点
,使得
,则圆
的半径
的取值范围是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/53bdf5b1d9b677136795a57a52f1527f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d3aa3adcb154f6144903d456289ecb0f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7789a500686c7a73770404ead6af0590.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7724a3ce665c09f3662b35ec80168a9e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/11bc05f41215f9894e11d1df0465751a.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
单选题
|
适中
(0.65)
【推荐2】过双曲线W:
的右顶点A作斜率为-2的直线
,
与W的渐近线交于B,C两点.若
,则双曲线W的离心率为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a5ec7fa23be9cbe9a50607ea6bc8a4ff.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dde631eda5b9fc3ebd1172d6a99ebf91.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
单选题
|
适中
(0.65)
解题方法
【推荐1】设向量
,
,且
,
,则
的值等于( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6f0e29216d94b433d8fd9a0400abaf4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/91642b6b574448218d6882e95c81103e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1488a4ac32b5499647a5eb5ba1755eaa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/823ab696d27d40920c39b8c910789380.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b3c1a764c0f58f69357d4cd790d3a5d4.png)
A.1 | B.![]() | C.![]() | D.0 |
您最近一年使用:0次
单选题
|
适中
(0.65)
名校
解题方法
【推荐2】已知向量
与
共线,其中A是
的内角,则角A的大小为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/324d5b1e0dd0e46976ff1abac8fcbaa5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/321622be4c2128ce447abca12a23ae10.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次