2log80-2log5-5log75+5log3

Kelas 10 Matematika
Bab Logaritma

^ = pangkat

²log 80 - ²log 5 - ^5log 75 + ^5log 3
= ²log (80 : 5) + ^5log 3 - ^5log 75
= ²log 16 + ^5log (3/75)
= ²log 2^4 + ^5log (1/25)
= 4 . ²log 2 + ^5log 5^-2
= 4 - 2
= 2

= 2log80 - 2log5 - 5log75 + 5log3
= 2log(80÷5) - 5log(75×3)
= 2log16 - 5log225
= log16² - log225^5
= log(16²)÷(225^5)
= -9,35 (hasil hitungan kalkulator)

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