Nomor 7,mohon bantuannya

Bab Logaritma
Matematika SMA Kelas X

((²log 5 . (1/log 5)) + (1/³log 2)) : (1 + ²log 15)
= ((²log 5 . ⁵log 10) + ²log 3) : (²log 2 + ²log 15)
= (²log 10 + ²log 3) : (²log (2 . 15))
= (²log (10 . 3)) : (²log 30)
= (²log 30) : (²log 30)
= 1