Matematika

Pertanyaan

Tentukan nilai fungsi berikut untuk x=-3,-2,-1,0,1,2,3,4,5
a.f(x)=3x+2
b.g(x)=x²+8
please yang bisa jawab dong

1 Jawaban

  • a. f(-3) = 3(-3) + 2
    = (-9) + 2
    = -7
    f(-2) = 3(-2) + 2
    = (-6) + 2
    = -4
    f(-1) = 3(-1) + 2
    = (-3) + 2
    = -1
    f(0) = 3(0) + 2
    = 0 + 2
    = 2
    f(1) = 3(1) + 2
    = 3 + 2
    = 5
    f(2) = 3(2) + 2
    = 6 + 2
    = 8
    f(3) = 3(3) + 2
    = 9 + 2
    = 11
    f(4) = 3(4) + 2
    = 12 + 2
    = 14
    f(5) = 3(5) + 2
    = 15 + 2
    = 17
    b. g(-3) = (-3)² + 8
    = 9 + 8
    = 17
    g(-2) = (-2)² + 8
    = 4 + 8
    = 12
    g(-1) = (-1)² + 8
    = 1 + 8
    = 9
    g(0) = (0)² + 8
    = 0 + 8
    = 8
    g(1) = (1)² + 8
    = 1 + 8
    = 9
    g(2) = (2)² + 8
    = 4 + 8
    = 12
    g(3) = (3)² + 8
    = 9 + 8
    = 17
    g(4) = (4)² + 8
    = 16 + 8
    = 24
    g(5) = (5)² + 8
    = 25 + 8
    = 33

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