Matematika

Pertanyaan

Jika ³log5 = P dan ⁵log4 = Q, maka ⁴log15 = ?

2 Jawaban

  • ⁴log15 = log15 / log 4 = ³log (5 x 3) / ⁵log4 = ³log5 + ³log3 / ⁵log4 = p + 1 / q
  • 3 log 5 = p
    -> log 5 / log 3 = p
    -> log 3 = log 5 / p
    -> log 5 = log 3 .p

    5 log 4 = q
    -> log 4 / log 5 = q
    -> log 4 = q . log 5
    -> log 5 = log 4 / q

    4 log 15
    = log 15 / log 4
    = log 3.5 / q . log 5
    = log 3 + log 5 / q . log 5
    = log 5.p + log 5 / q . log 5
    ------------------------------------------ di bagi log 5
    = p + 1 / q

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