Question

4 elevado a 2-x igual a um sobre dezesseis

Answer 1

$Resolu\c{c}\~ao \to \left\{\begin{array}{ccc}4^{2-x} = \frac{1}{16}\\\\4^{2-x} = 16^{-1}\\\\4^{2-x} = (4^2)^{-1}\\\\4^{2-x} = 4^{-2}\\\\2-x = -2\\\\-x = -2-2\\\\-x = -4\\\\\boxed{\boxed{x = 4}}\end{array}\right$

Espero ter ajudado. =^.^=