Question

qual a exponencional de 4x= 128

Answer 1

$4^x=128\\ \\ 2^{2x}=2^7\\ \\ 2x=7\\ \\ x=\frac{7}{2}$

Answer 2

$4^x = 128 \\ 2^{2x} = 2^7 \\ 2x =7 \to x = \frac{7}{2}$