1 .
,求证:
的充分必要条件是
,
中至少有一个为1.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ea77b7c1c49d58da6fbaf2890c65634a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/523c7ea7352bd6b81578373bce98ab24.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8d8b3f66119c2ce542984d12eb2b6b77.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9dff9388eee5c812d183b254d13f461b.png)
您最近一年使用:0次
2 . 复数
,存在实数
,使
成立.
(1)求证:
为定值;
(2)求
的取值范围
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/82b043be463a12c01175d22d744aa20c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e009cb31fc7d1f9149d3c6c6434dde0.png)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b0113fd4c7d157757571f9a009e02af.png)
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/de971553ea8a66d7849b138a4a0625c5.png)
您最近一年使用:0次
3 . 对任意的复数
,
证明:
(1)
;
(2)
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/af68f652b4c13657ffddf3c9e7eb262b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fa224ed9be8766a4d0b5138bd57de0f0.png)
(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8ee028394345d17bbc55868935e3126c.png)
(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/622e0a3909431492467887938381948e.png)
您最近一年使用:0次
2020-06-25更新
|
104次组卷
|
2卷引用:沪教版(上海) 高二第二学期 新高考辅导与训练 第13章 复数 13.3(1) 复数的加法