0 votes 0 votes Let $f(z)=\dfrac{az+b}{cz+d}.$ If $f(z_{1})=f(z_{2})$ for all $z_{1}\neq z_{2},a=2,b=4$ and $c=5,$ then $d$ should be equal to ________. Complex Analysis gate2015-ec-2 numerical-answers complex-analysis + – Milicevic3306 asked Mar 27, 2018 • recategorized Feb 27, 2021 by Lakshman Bhaiya Milicevic3306 16.0k points 99 views answer comment Share Follow See all 0 reply Please log in or register to add a comment.