Question

4^x=2^-3 alguém min ajudaaaa!!?

Answer 1

$\large\boxed{\begin{array}{l}\sf 4^x=2^{-3}\\\sf (2^2)^x=2^{-3}\\\sf 2^{2\cdot x}=2^{-3}\\\sf 2^{2x}=2^{-3}\\\sf bases~iguais~nos~d\acute a~expoentes~iguais\\\sf 2x=-3\\\sf x=-\dfrac{3}{2}\\\sf S=\bigg\{-\dfrac{3}{2}\bigg\}\end{array}}$