已知向量
,
.若
与
垂直,则
( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/50478c1a6f6d2848096414393191e8e7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b2708e60352ce6832b5ddf1b41686c09.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/64c5562bd4d1b54424330cb6329cd79d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b45ba716f03748c19b7ce2f99af536ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6d6fce004c47849c29ebd8d5d7c16e98.png)
A.1 | B.![]() | C.2 | D.4 |
更新时间:2023-12-20 10:59:43
|
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单选题
|
适中
(0.65)
名校
解题方法
【推荐1】已知平面向量
均为单位向量,且
,若
,则
的取值范围为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b172cf8d898883d82e973f28c3c3a3e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c87f0ca6032f85abf58764ccaafd40bb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5af70c2a213ed4632100dc5c3fb07bde.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83634e314df24df73ae37d25a44d20e3.png)
A.![]() | B.![]() |
C.![]() | D.![]() |
您最近一年使用:0次
单选题
|
适中
(0.65)
【推荐3】已知单位向量
,
,
,
满足:
,
向量
(
),则
的最小值为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cb80eb942aafb194fadc473776f35b1d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/433b94c39737727e53468df419d8314a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bb573cc0f30d5c32cdad1510793f0e7b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ec655f610928ca21831e26645a21e99c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d9fd98adf04698b8252925545a601218.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/307c813f42759a96b3c70505c81fadbf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/da68ba13bc08adb31b09f13c0050588d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7e36c9c91220b0f2cbd4a48e8fa90e3d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ed3da4cd32573ab7dac6c5e87a13a8e4.png)
A.![]() | B.1 | C.![]() | D.![]() |
您最近一年使用:0次
单选题
|
适中
(0.65)
【推荐2】已知向量
,
(其中
为实数),则“
”是“
”的( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9664ea894084e9a4d152689659e78ee7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/353ec11e5514de4052ab50307a797218.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e94f16d5ed858699bfea5039a7bf8ae6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aa5aa846a5b7c96fe2ce665eb1ea5f0e.png)
A.充分不必要条件 | B.必要不充分条件 |
C.充要条件 | D.既不充分也不必要条件 |
您最近一年使用:0次