ada yang bisa bantu?

yg atas dulu
saya ganti soalnya tapi jadi 5 log 81 jangan 3 yah

^5log 81 . ^27log 125 - ^4log 32
= ^5log 3^4 . ^3³log 125 - ^2²log 2^5
= (4/3) ^5log 125 - (5/2) ^2log 2
= (4/3) ^5log 5^3 - 5/2
= 4/3 × 3 - 5/2
= 4 - 5/2
= 8/2 - 5/2 = 3/2
yg bawah
^2log 40 - ^2log 5
= ^2log (40/5)
= ^2log 8
= 3
jadinha
(3/2) / 3
= 3/2 × 1/3
= 1/2