Question

equação exponencial 4 elevado a x menos 1 igual a 1 sobre 2

Answer 1

b0a tarde !

$4^{x-1} = \frac{1}{2}$

$(2^{2}) ^{x-1} = 2^{-1}$

$2^{2x-2} = 2^{-1}$ -----> descarta as bases.

2x-2=-1

2x=  -1 +2 = 1
2x=1
x=1/2