Question

Help!!!!!!!!
3log0.4_5*log5_2,5

Answer 1

$3log_{0.4} 5*log_5 2.5=3 frac{log_5 2.5}{log_5 0.4} =3log_{0.4}2.5=3log_{ frac{2}{5} } frac{5}{2} =$
$3log_{ frac{2}{5} } (frac{2}{5})^{-1} =-3$