名校
1 . 已知复数
,若存在实数
,使
成立.
(1)求证:
定值;
(2)若
,求
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09eccff2f0c0caa72bcfca4854919fce.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/24b247ab2c92de2f1d97e6feb84fec20.png)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b0113fd4c7d157757571f9a009e02af.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73286feace973d5bcabe7178788132ee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c042c0c7e253a65f770583c5c6696770.png)
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2020-05-02更新
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252次组卷
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6卷引用:上海市大同中学2020-2021学年高二下学期期末数学试题