18.求 e^1-1(pi)/(2), exp[(1+ipi)/4], 3^i 和 (1+i)^i 的值.

18.求 e^1-i(pi)/(2),exp[(1+iπ)/4],3^i和(1+i)^i 的值.18.求 $e^{1-i\frac{\pi}{2}}$,exp[

若 ((1+i))^n=((1-i))^n, 试求n的值.

1.3 解方程组 ) 2(z)_(1)-(z)_(2)=i (1+i)(z)_(1)+i(z)_(2)=4-3i .

1.1 计算下列各式.-|||-(1) (1+i)-(3-2i);-|||-(2) ((a-ib))^3;-|||-(3) dfrac (1)((i-1)(i-

1.1计算下列各式.-|||-(1) (1+i)-(3-2i) ;-|||-(2) ((a-ib))^3 ;-|||-(3) dfrac (i)((i-1)(i

[判断题] 用公式A=Pi（1+i）n／［（1+i）n-1］来分析投资回收与投资回报，Pi就是投资者投入资本金后所获得的投资回收，Pi/［（1+i）n-1］就是投资者的投资回报。（）A . 正确B . 错误

1.6 求下列复数的模与辐角主值:-|||-(1) sqrt (3)+i;-|||-(2) -1-1;-|||-(3) -i;-|||-(4) -1+31.

15.若(1+i))^n=((1-i))^n,试求n的值.15.若,试求n的值.

dfrac ((x+1)+i(y-3))(5+3i)=1+i ，则实部dfrac ((x+1)+i(y-3))(5+3i)=1+i，虚部 dfrac ((x+1

设z=(（1+i）（3-i）)/(（1+2i）（sqrt(2)+i）)，则z的模为（ ）A. $\frac{2}{\sqrt{3}}$B. $\frac{2\s