1 |
-2+i |
1 |
1-2i |
. |
z |
A.-
| B.-
| C.
| D.
|
1 |
-2+i |
1 |
1-2i |
-2-i |
(-2+i)(-2-i) |
1+2i |
(1-2i)(1+2i) |
-2-i |
5 |
1+2i |
5 |
-1 |
5 |
1 |
5 |
. |
z |
-1 |
5 |
1 |
5 |
. |
z |
1 |
5 |
5 |
2-i |
A.2-i | B.i-2 | C.-2-i | D.2+i |
A.2 | B.1 | C.±1 | D.-1 |
1+mi |
1-i |
A.-i | B.i | C.-1 | D.1 |
A.第四象限 | B.第三象限 | C.第二象限 | D.第一象限 |
2-ai |
1+i |
A.-2 | B.-
| C.
| D.2 |
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