4^x+1 + 2^2x = 40Помогите !!!

Question

4^x+1 + 2^2x = 40

Помогите !!!

Answer 1

4^(x+1 )+ 2^2x = 40 2^2(х+1)+2^2х=40 2^2х(4+1)=40 2^2х=40/5=8 2^2х=2^3 2х=3, х=3/2=1,5