Jika diketahui ²log 9=a dan 5log2=b Tentukan ²log 3 - 5log 3 =…

jawab

²log 9 = a → ²log 3² = a
2 (²log 3) = a
²log 3 = 1/2 a

⁵log 2 = b

⁵log 2. ²log 3 = 1/2 a  b
⁵log 3 = 1/2(ab)

²log 3 - ⁵log 3 = (1/2 a) - (1/2 ab)
²log 3 - ⁵log 3 = 1/2 a ( 1 - b) = a(1- b) /(2)