Question

log1/7(x-4)>-1

Помогите срочно

Answer 1

$log _{ frac{1}{7} }(x-4) textgreater -1\\ left { {{x-4 textgreater 0} atop {x-4 textless ( frac{1}{7}) ^{-1} }} right.\\ left { {{x textgreater 4} atop {x-4 textless 7}} right. \\ left { {{x textgreater 4} atop {x textless 11}} right.$
Ответ : x ∈ (4 ; 11)