To every complex number , z different from -i . assign

f(z) = $\displaystyle \frac{iz}{z+i}$

Denote by M the point of the plane with affix z .

A) a) Find the coordinates of the point B whose affix z0 is the solution of the equation f(z0)= 1 + 2i.

Work !

Affix of B is z0 = xB + iyB

f(z0) = yB = 1 + 2i ..

From the question : Solution : means that if I replace the values I will get zero