Matematika

Pertanyaan

Diketahui f(x) = px + q, f(-2) = 8 dan f(1) = 1 nilai f(4) adalah

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  • Bab Fungsi
    Matematika SMP Kelas VIII

    f(x) = px + q

    f(1) = p + q = 1
    f(-2) = -2p + q = 8
    --------------------------- -
    3p = -7
    p = -7/3

    p + q = 1
    q = 1 + 7/3
    q = 10/3

    f(x) = -7/3 x + 10/3
    f(4) = -7 . 4 / 3 + 10 / 3
    f(4) = -28/3 + 10/3
    f(4) = -18/3 = -6

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