Define H+ = {z ∈ ℂ : y > 0}, H- = {z ∈ ℂ : y < 0}
and L+ = {z ∈ ℂ : x > 0}, L- = {z ∈ ℂ : x < 0}, then the function f(z) = \(\frac{2z+1}{5z+3}\)
1
maps H+ onto H+ & H- onto H-
2
maps H+ onto H- & H- onto H+
3
maps H+ onto L+ & H- onto L-
4
maps H+ onto L- & H+ onto L+