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1 . 在平面直角坐标系中,O为坐标原点,
,
,且
,A,B,C三点满足
.
(1)求证:A,B,C三点共线;
(2)若函数
的最小值为
,求实数m的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fdd04ec1b4569f53912cd42767fb32e7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/080ed37126fe21c2f16fdbe293fbbf45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3ce485410257c9c1fae9d87ce3e44cc8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7716676fd9d0ba485e3d463b6db284c3.png)
(1)求证:A,B,C三点共线;
(2)若函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dc72c843e56a0473966930cfc93c426e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d8e75c9db745dc00e734a1ef487bd368.png)
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2020-03-05更新
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4卷引用:黑龙江省哈尔滨市第三中学2020-2021学年高一下学期3月月考数学试题