Question

log 243/3125 base 3/5

Answer 1

$log_{ \frac{3}{5} }( \frac{243}{3125} ) \\ log_{ \frac{3}{5} }{( \frac{3}{5} )}^{5} \\ 5 \: \: \:$

Answer 2

log 243/3125 base 3/5

(243/3125)=(3/5)^x

(3/5)^5=(3/5)^x

therefore x=5