Question

2^{x+1}+2^{x-2}=9/2
Por favor, me ajudem.

Answer 1

Olá Aritane

2^(x + 1) + 2^(x - 2) = 9/2

2*2^x + 2^x/4 = 9/2

8*2^x + 2^x = 4*9/2 = 18 

9*2^x = 18 

2^x = 2

x = 1