题目内容
复数z=
等于( )
| 2-i |
| 2+i |
A.
| B.
| C.
| D.
|
z=
=
=
.
故选C.
| 2-i |
| 2+i |
| (2-i)(2-i) |
| (2+i)(2-i) |
| 3-4i |
| 5 |
故选C.
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题目内容
| 2-i |
| 2+i |
A.
| B.
| C.
| D.
|
| 2-i |
| 2+i |
| (2-i)(2-i) |
| (2+i)(2-i) |
| 3-4i |
| 5 |