tolong dibantu ya kak no 18 dan 19

19.) ^8log4+^27log1/9
^2^3 log 2^2 + ^3^3 log 3^-2
= 2/3 (1) + ( (-2/3) (1) )
=2/3 - 2/3
= 0/3 = 0.

maaf kalau slh,,