Matematika

Pertanyaan

Suatu fungsi dinyatakan dengan rumus f(x) = mx + 8.Jika f(-3) = 1.Maka nilai 2f(-2) + 1 =.....

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  • Bab Fungsi
    Maetmatika SMP Kelas VIII

    f(x) = mx + 8

    f(-3) = 1
    -3m + 8 = 1
    -3m = 1 - 8
    m = -7/-3
    m = 7/3

    f(x) = (7/3) x + 8
    f(-2) = (7/3) . (-2) + 8
           = -14/3 + 24/3
           = 10/3

    2 . f(-2) + 1 = 2 . (10/3) + 1
                       = 20/3 + 3/3
                       = 23/3

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