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1 . 在平面直角坐标系
中,已知向量
点Q满足
曲线
区域
若
为两段分离的曲线,则( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ee31829d0d4d5f779a957d7df8058ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c4065122afbc3fa32df82e45351500ba.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a79740405a410b1bc0b1eb8461df0db0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4b69b8c589b97f75b4c68bb5c60549f9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0913f76c6d5f504b389f41e9cd3a2def.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d7680916ae29159d485852b67b018c93.png)
A.![]() | B.![]() |
C.![]() | D.![]() |
您最近一年使用:0次
2019-11-06更新
|
274次组卷
|
2卷引用:上海市曹杨二中2018-2019学年高二下学期期中数学试题
2 . 已知向量
,
,且向量
,
满足关系式:
,其中
.
(1)求证:
;
(2)试用
表示
,求
的最大值,并求此时向量
的夹角.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/55ab1e3217a18c9119740c8055adc4f8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef43d2ceda1014d82685c878aa7a2e12.png)
![](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/1edebe0261b0c22b2516a104e665c174.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2f0d68648b10fce54dfc19c5ee60086d.png)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ec1cc86b7ff004a6ab4f88b7af2d58da.png)
(2)试用
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6b0fe4d834e8eaca89ceaf9c64cdabd9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6b0fe4d834e8eaca89ceaf9c64cdabd9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6b0fe4d834e8eaca89ceaf9c64cdabd9.png)
您最近一年使用:0次