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Diketahui f(x) = 2x - 3 dan g(x) = x2 + 3x - 5. Nilai (g o f)(2) =

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Diketahui f(x) = 2x - 3 dan g(x) = x² + 3x - 5. Nilai (g o f)(2) = ….

Jawab:

f(x) = 2x – 3

g(x) = x² + 3x – 5

(g o f)(2) = …. ?

(g o f)(2) = g(f(2))

                = g(2(2) – 3)

                = g(4 – 3)

                = g(1)

                = (1)² + 3(1) – 5

                = 1 + 3 – 5

(g o f)(2) = -1

Jadi Nilai (g o f)(2) = -1.

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