Question

Помогите решить срочно

Answer 1

18.
$( frac{1}{2} )^{x - 2} = frac{1}{8} \( 2 ^{ - 1} ) ^{x - 2} = 2 ^{ - 3} \ 2 ^{ - x + 2} = 2 ^{ - 3} \ - x + 2 = - 3 \ - x = - 3 - 2 \ - x = - 5 \ x = 5$