题目
设 z^3 = 1 且 operatorname(Im)(z) > 0，则 z = ( )。A. -(sqrt(3))/(2) + (1)/(2)iB. (sqrt(3))/(2) + (1)/(2)iC. (1)/(2) + (sqrt(3))/(2)iD. -(1)/(2) + (sqrt(3))/(2)i
设 $z^3 = 1$ 且 $\operatorname{Im}(z) > 0$，则 $z = ($ $)$。
A. $-\frac{\sqrt{3}}{2} + \frac{1}{2}i$
B. $\frac{\sqrt{3}}{2} + \frac{1}{2}i$
C. $\frac{1}{2} + \frac{\sqrt{3}}{2}i$
D. $-\frac{1}{2} + \frac{\sqrt{3}}{2}i$
题目解答
答案
D. $-\frac{1}{2} + \frac{\sqrt{3}}{2}i$