题目内容
计算:
(1)(3+2i)+(-2-i)-(1+i);
(2)i2013•(1+i)•(2-i);
(3)
.
(1)(3+2i)+(-2-i)-(1+i);
(2)i2013•(1+i)•(2-i);
(3)
| 1+2i |
| 3-4i |
(1)原式=(3-2-1)+(2-1-1)i=0-----------------------------------------------------------(4分)
(2)原式=i2012•i(1+i)(2-i)=i(1+i)(2-i)=(-1+i)(2-i)=-1+3i----------------(8分)
(3)原式=
| (1+2i)(3+4i) |
| (3-4i)(3+4i) |
| -5+10i |
| 25 |
| 1 |
| 5 |
| 2 |
| 5 |
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