题目内容
设i为虚数单位,则
=( )
| 5-i |
| 1+i |
| A.-2-3i | B.-2+3i | C.2-3i | D.2+3i |
∵
=
=
=2-3i
故选C.
| 5-i |
| 1+i |
| (5-i)(1-i) |
| (1+i)(1-i) |
| 4-6i |
| 2 |
故选C.
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相关题目
设i为虚数单位,则
=( )
| 5-i |
| 1+i |
| A、-2-3i | B、-2+3i |
| C、2-3i | D、2+3i |