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1 . 已知向量
,
.
(1)若
,求
;
(2)若
,
①求
;
②已知
,求
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a67711170219688d03144200ae396e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7d5de571daa349850dbc7fc98b7b990a.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/076559f08d17fb25e82886e791719e52.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6cc9750c313ee972124cb62c4a6fb7ea.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/44726b1d833cfef78c52b027817a69ce.png)
①求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/032f8f657f9163ebc64db95d214f4091.png)
②已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d394016b9fecac73f38cbc4ff18dee2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6f90c4754e6b6fc862d72943fb35569.png)
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2卷引用:江苏省扬州市新华中学2023-2024学年高一下学期适应性练习数学试题