i |
2-i |
A.第一象限 | B.第二象限 | C.第三象限 | D.第四象限 |
i |
2-i |
i(2+i) |
(2-i)(2+i) |
-1+2i |
5 |
1 |
5 |
2 |
5 |
i |
2-i |
1 |
1+i |
A.
| B.
| C.1-i | D.1+i |
1+i |
1-i |
π |
5 |
π |
5 |
A.x4+x3+x2+x+1=0 | B.x4-x3+x2-x+1=0 |
C.x4-x3-x2+x+1=0 | D.x4+x3+x2-x-1=0 |
1+i |
i3 |
2 |
1-i |
A.2-2i | B.1-i | C.i | D.1+i |
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