复数的幂计算规则

close  all
a=9;                  
b=0:0.1:5;

result1 = exp(1j*2*pi*a.*b);
result2 = (exp(1j*2*pi*a)).^b;
idx=find(result1==result2);
b_idx=b(idx);



figure
plot(b,angle(result1(:)),'-r*')
hold on
plot(b,angle(result2(:)),'bo')
grid on