已知向量
,
.
(1)若
,求实数t的值;
(2)若
,求实数t的值;
(3)若
与
的夹角为钝角,求实数t的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/623072df133bfa00d73180fe70b22980.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fa79b519b37fd531a56a8fa9c3119509.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd79264e130de60a100b001b5d45585c.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8bf21fef3026cfe445a855c94cab5c84.png)
(3)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/64c5562bd4d1b54424330cb6329cd79d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b45ba716f03748c19b7ce2f99af536ab.png)
更新时间:2024-05-11 21:35:34
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