Matematika

Pertanyaan

Dik: f(x)=2x+1. Dan g(x)=x"
Tentukan :
A. (Fog)(x). B.(gof)(x). C.(Fof)(x). D.(Gog)(x)

1 Jawaban

  • a. (Fog)(x). B.(gof)(x). C.(Fof)(x). D.(Gog)(x)
    jwb :
    a. f (g (x)) = f (x^2)
    = 2x + 1
    = 2 (x^2) + 1
    = 2x^2 + 1

    b. g (f(x)) =  (2x + 1)
    = x^2
    = (2x + 1) ^ 2
    = 4x^2 + 4x + 1

    c. f (f (x)) = f ( 2x + 1)
    = 2x + 1
    =2 (2x + 1) + 1
    = 4x + 3

    d. g (g(x)) = g (x^2)
    = x^2
    = (x^2)^2
    = x^4

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