Matematika

Pertanyaan

please bantu dongg..
please bantu dongg..

2 Jawaban

  • ^(6x-5)log 16 = ^5log 4
    ruas kanan agar sama dikuadratka
    ^(6x-5)log 16 = ^5²log 4²
    ^(6x-5)log 16 = ^25log 16
    itukan udah sama 16 tinggal atas nya diselesaikan
    6x - 5 = 25
    6x = 30
    x = 30/6
    x = 5
  • persamaan logaritma
    ⁶ˣ⁻⁵log 16 = ⁵log 4
    log 16/ log(6x-5) = log 4/ log 5
    log(6x-5)/log 5  = log 16/log 4
    ⁵log (6x - 5) = ⁴log 16 = ⁴log 4² = 2
    ⁵log (6x - 5)= 2 ---> ᵃlog b = x --> b = aˣ
    6x - 5 = 5²
    6x = 25 + 5
    x = 5