题目内容
复数
的模为
,则实数a的值是______.
| ||
| a+2i |
| 2 |
|
|=
=
=
,化简得2+4a2=2(a2+4),a2=3,a=±
故答案为:±
.
| ||
| a+2i |
|
| ||
| |a+2i| |
| ||||
|
| 2 |
| 3 |
故答案为:±
| 3 |
练习册系列答案
相关题目
题目内容
| ||
| a+2i |
| 2 |
| ||
| a+2i |
|
| ||
| |a+2i| |
| ||||
|
| 2 |
| 3 |
| 3 |