diketahi log 2=a log 5=b tentukan nilai 20 log 100

Kelas 10 Matematika 
Bab Logaritma

²⁰log 100 
= log 100/log 20
= 2/(log (4 . 5))
= 2/(log 4 + log 5)
= 2/(log 2² + b)
= 2/(2 . log 2 + b)
= 2/(2a + b)