题目内容
设z=
+
i,那么z+z2+z3+z4+z5+z6=______.
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| 2 |
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| 2 |
∵z=
+
i=cos
+isin
,∴z6=cos2π+isin2π=1,∴z+z2+z3+z4+z5+z6 =
=0,
故答案为:0.
| 1 |
| 2 |
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| 2 |
| π |
| 3 |
| π |
| 3 |
| z(1-z6) |
| 1-z |
故答案为:0.
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| π |
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| π |
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| z(1-z6) |
| 1-z |