diketahui f(x)=x²-5x+6 dan g(x)=2x+5 tentukan nilai fungsi (gof)(-3)
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Penjelasan dengan langkah-langkah:
f(x) = x² - 5x + 6
g(x) = 2x + 5
(g o f)(x)
g(f(x))
= g(x² - 5x + 6)
= 2(x² - 5x + 6) + 5
= 2x² - 10x + 12 + 5
= 2x² - 10x + 17
(g o f)(-3)
Substitusi nilai x dgn -3
= 2(-3)² - 10(-3) + 17
= 18 - (-30) + 17
= 18 + 30 + 17
= 65
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