题目内容
设z∈C,且(1+2i)
=4+3i(i为虚数单位),则z=______,|z|=______.
| . |
| z |
∵(1+2i)
=4+3i,∴
=
=
=
=2-i,
∴z=2+i,|z|=
.
故答案为 2+i,
| . |
| z |
| . |
| z |
| 4+3i |
| 1+2i |
| (4+3i)(1-2i) |
| (1+2i)(1-2i) |
| 10-5i |
| 5 |
∴z=2+i,|z|=
| 5 |
故答案为 2+i,
| 5 |
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