Question

A) Jika log ()³ = 9 maka log a - log b = ...
b) 2. log 0,3 - log 225 + 2. log 0,5 + 6 = ...

tolong pakai cara, trimakasih.

Answer 1

A. Log (a/b)^3 = 9
  3 x Log (a/b) = 9
 Log (a/b) = 3
Log a - Log b = 3

b. 2 log 0,3 - log 225 + 2. log 0,5 + 6 = log (3/10)² - log 225 + log (5/10)² + 6
 = Log (9/100) x(25/100) / 225 + 6
= Log 225 /(10.000 x 225)  + 6
= Log 1/10.000 + 6
= Log 10^-4 +6
= -4 . log 10 + 6
= -4 . + 6
= 2