Tolong dong beserta jawabannya!!

5log4 . 2log3 . 9log5
= 5log2^2 . 2log3 . (3^2)log5
= 2 . 5log2 . 2log3 . 1/2 . 3log5
= 2 . 1/2 . 5log2 . 2log3 . 3log5
= 2 . 1/2 . 5log5
= 1