Diketahui log 2 = a dan log 3 = b maka log 45 adalah...
Matematika
syarifdpeace
Pertanyaan
Diketahui log 2 = a dan log 3 = b maka log 45 adalah...
2 Jawaban
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1. Jawaban Takamori37
log 45 = log(90/2) = log 90 - log 2 = log(10 x 9) - log 2
log 10 + log 3^2 - log 2
1 + 2 x log 3 - log 2
1+2b-a -
2. Jawaban rezamahesaa
log 45 = log (10x3x3 / 2)
= log10 + log3 + log3 - log2
= 1 + b + b - a
= 1 - a + 2b