InterviewSolution
Saved Bookmarks
| 1. |
If `z^(2) + |z|^(2) = 0`, show that z is purely imaginary. |
|
Answer» Let z = (x + iy). Then, `z^(2)+|z|^(2)=0 rArr x^(2)-y^(2)+2ixy + x^(2)+y^(2)=0` `rArr" "x^(2)+ixy=0 rArr x^(2)=0 and xy = 0 rArr x = 0`. `therefore" "z` is purely imaginary. |
|