复数|2/(1+i)|=

问题描述:

复数|2/(1+i)|=
复数z=1/(i-1)的模为

l2/(1+i)l
=l2*(1-i) /2l
=l1-il
=根号2
l1/(1-i)l
=l(1+i)/2l
=根号2 /2