exp(i*theta)=exp{2*pi*i*[theta/(2*pi)]}=[exp(2*pi*i)]^[theta/(2*pi)]=1^[theta/(2*pi)]=1?

问题描述:

exp(i*theta)=exp{2*pi*i*[theta/(2*pi)]}=[exp(2*pi*i)]^[theta/(2*pi)]=1^[theta/(2*pi)]=1?
exp(i*theta)=exp{2*pi*i*[theta/(2*pi)]}=[exp(2*pi*i)]^[theta/(2*pi)]=1^[theta/(2*pi)];
exp(2*pi*i)等于1是吧!那这个式子哪里出问题了呢?难道复数运算里面指数不能随便放入括号里吗?
求教

注意在复数范围内,1的方根可不止一个!而1^[theta/(2*pi)]可看作1的2pi/theta次方根.若2pi/theta是有理数,设2pi/theta=m/n,则1^[theta/(2*pi)]有t=lcm(m,n)个结果:{exp{i*2kpi/(2pi/theta)}|0