题目内容
设复数z满足z(2+i)=3-4i(其中i为虚数单位),则z的模为______.
∵复数z满足z(2+i)=3-4i,
∴z=
=
=
,
∴|z|=
=
,
故答案为:
.
∴z=
| 3-4i |
| 2+i |
| (3-4i)(2-i) |
| 5 |
| 2-11i |
| 5 |
∴|z|=
| 1 |
| 5 |
| 22+(-11)2 |
| 5 |
故答案为:
| 5 |
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题目内容
| 3-4i |
| 2+i |
| (3-4i)(2-i) |
| 5 |
| 2-11i |
| 5 |
| 1 |
| 5 |
| 22+(-11)2 |
| 5 |
| 5 |