Question

Resolva a equação exponencial: 2^2x+1 + 3.2^x+1 =  8

Answer 1

$2^{x+1}+3\cdot2^{x+1}=8$

$2^{x}\cdot2+3\cdot2\cdot2^{x}=8$

$2^{x}=y$

$2y+6y=8$

$8y=8$

$y=1$

$2^{x}=1$

$x=0$