jika log 3 = 0,477 dan log 2 = 0,301, nilai log 18 =

log 3 = 0,477
log 2 = 0,301


log 18 = log(9 x 2)
log(9 x 2) = log 9 + log 2
log 9 + log 2 = log(3 x 3) + log 2
log(3 x 3) + log 2 = log 3 + log 3 + log 2
log 3 + log 3 + log 2 = 0,477 + 0,477 + 0,301 =1,255

smoga membantu

log18 = log(2.9) = log2 + log 9
⇔ log 2 + log3²
⇔ log2 + 2.log3
karena log 3 = 0.477 dan log 2 = 0.301 maka:
⇔  0.301 + 2.(0.477)
⇔  0.301 + 2.(0.477)
⇔  0.301 +0.954
 = 1,255

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