Log1/5 (9)+2log1/5(5/3) =
Log1/5 (9)+log1/5(5/3)∧2= Log1/5 (9×(5/3)∧2)=Log1/5 (9×(25/9) =
Log1/5 (25)=
Log1/5 (1/5)∧(-2)=-2