Matematika

Pertanyaan

diketahui f (x) =3x+2 dan g (x) =x+2 maka nilai dari (f0g) (2) =………
A. 3-8x
B. 4-8x
C. 5-8x
D. 6-8x
E. 7-8x


bantu jawab ya

2 Jawaban

  • (f o g)(x) = f(g(x))
    =f(x + 2)
    =3 (x+ 2) + 2
    = 3x + 6 + 2
    = 3x + 8

    (f o g)(2) = 3(2) + 8 = 6 + 8 = 14
  • f(x) = 3x + 2
    g(x) = x + 2

    (fog)(x) = f(g(x))
    = 3(x+2) + 2
    = 3x+6+2
    = 3x + 8
    (fog)(2) = 3(2) + 8
    = 6+8
    = 14

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