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1 . 若
是任意的非零向量,则下列叙述正确的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ae951e0bb5a2a406f1572fc1e4964265.png)
A.若![]() ![]() | B.若![]() ![]() |
C.若![]() ![]() | D.若![]() ![]() |
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2023-07-08更新
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318次组卷
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3卷引用:湖北省荆门市2022-2023学年高一下学期期末数学试题
2 . 在平面直角坐标系内,已知
,
),
.
(I)若
,求证
为直角三角形.
(Ⅱ)若
,求实数λ、t的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/87702ca4e2800e2063867819e6101748.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/69be470227445b84e0ff57e07f17a229.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9096aa9154ca32f3d5a947cc72b88fc5.png)
(I)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f66884efff7400f92b530d69d029778d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
(Ⅱ)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/948cb5cb3919d7250ff1191e6b9052a5.png)
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