F (x) R-R finding the inverse function of F (x) = y = x + 2 ^ x

F (x) R-R finding the inverse function of F (x) = y = x + 2 ^ x

Let y denote X
y+1/4=1/4+x^2+x
y+1/4=(x+1/2)^2
Sqrt[y+1/4]=x+1/2
x=Sqrt[y+1/4]-1/2
Replace x with y in the last step, and y with X is the solution. The domain of definition adopts the value range of Y in the original function [- 1 / 4, positive infinity]