已知平面向量
,
,若向量
与
的夹角为钝角,则
的取值范围是______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ff0812ea92afd60233426521798f5ca7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/34229f2b59e19043f2a1e8690449540b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a2f4b1178f68bd147d1a2a6acd04435.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c94075193c11fe43f2396cff5a485054.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
22-23高一下·福建三明·期中 查看更多[3]
更新时间:2023-04-26 18:01:48
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【推荐2】向量平行的线性表示是___________ .
向量平行的坐标表示:设
,如果
,那么__________ ,反之亦成立.
已知A,B,C,O四点满足条件
,若
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向量平行的坐标表示:设
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/882691bd6f125c41577da996493660fc.png)
已知A,B,C,O四点满足条件
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/242dcfb2db2dababcff081bc002cd6bd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3999cdc37dd36b630ccfd72bd36e9f96.png)
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【推荐2】在直角坐标平面
中,
,动点
在圆
上,则
的取值范围为_______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ee31829d0d4d5f779a957d7df8058ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7e06937f997bd7d5aead6b401f9af988.png)
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【推荐1】,现有下列命题:①已知
,
,如果
与
的夹角为锐角,则
的取值范围是
或
;②函数
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中,A、B、C所对的边分别为a、b、c若
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为等腰三角形;④在
中,A、B、C所对的边分别为a、b、c若
,则
为钝角三角形;⑤在
中,A、B、C所对的边分别为a、b、c若
,则
;其中正确的命题是______________ (请填写相应序号).
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【推荐2】已知
,
,如果
与
的夹角是钝角,则
的取值范围是___________
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/07cc320ac85cab033945d840fa4cfcf1.png)
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