Jika f(x) = x+2 dan g(x) = 3x2 + 4x + 1 maka (gof)(x) =......
Matematika
gusadham
Pertanyaan
Jika f(x) = x+2 dan g(x) = 3x2 + 4x + 1 maka (gof)(x) =......
1 Jawaban
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1. Jawaban ekacahyati
(g o f)(x) = g(f(x))
= 3(x + 2)² + 4(x + 2) + 1
= 3(x² + 4x + 4) + 4x + 8 + 1
= 3x² + 16x + 21
Jadi (g o f)(x) = 3x² + 16x + 21