Question

Помогите решить

Log0,75 log27 81

Answer 1

$log_{0.75}(log_{27}81)=log_{0.75}(log_{3^3}3^{4})=log_{frac{75}{100}}(frac{4}{3}log_33)=\=log_{frac{3}{4}}(frac{4}{3})=log_{frac{3}{4}}(frac{3}{4})^{-1}=-1$