Verified answer

Resposta:

Explicação passo a passo:

(1/4)^(x+3)=1/256

(1/2^2)^(x+3)=(1/2)^8

(1/2)^2x+6=(1/2)^8 [ corta base 1/2]

2x+6=8

2x=8-6

2x=2

x=2/2

x=1