. |
z |
2+i |
1-2i |
A.
| B.-
| C.i | D.-i |
. |
z |
2+i |
1-2i |
(2+i)(1+2i) |
(1-2i)(1+2i) |
5i |
5 |
. |
z |
1 |
i |
A.2i | B.-2i | C.-2 | D.2 |
A.z=2+2i | B.z=-2-2i |
C.z=-2+2i,或z=2-2i | D.z=2+2i,或z=-2-2i |
1+i |
1-i |
A.i | B.-i | C.1+i | D.1-i |
. |
Z |
A.2 | B.2-i | C.2+2i | D.-1+3i |
3+4i |
2+i |
A.1 | B.2 | C.
| D.5 |
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