Matematika

Pertanyaan

5log(x-1)=1-5log(x+3)
tolong dijawab yahhh...
terima kasih :)

2 Jawaban

  • ...maaf ya kalo terlalu gelap...
    Gambar lampiran jawaban GiralGayartanta
  • ⁵log(x - 1) = 1 - ⁵log(x + 3)
    ⁵log(x - 1) + ⁵log(x + 3)  = 1
    ⁵log((x - 1)(x + 3))  = 1
    ⁵log(x² + 2x - 3) = ⁵log 5
    ⇔ x² + 2x - 3 = 5
    ⇔ x² + 2x - 3 - 5 = 0
    ⇔ x² + 2x - 8 = 0
    ⇔(x + 4) (x - 2) = 0
     x = -4   atau    x = 2

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