1. jika f (x)=X²+5X dan g(x)=X+1 maka nilai (fog)(4) adalah....
Matematika
hendra491
Pertanyaan
1. jika f (x)=X²+5X dan g(x)=X+1 maka nilai (fog)(4) adalah....
1 Jawaban
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1. Jawaban Jawer17
fog(x) = f(g(x)) = f(x + 1) = (x + 1)² + 5(x + 1)
fog(x) = x² + 2x + 1 + 5x + 5 = x² + 7x + 6
fog(4) = 4² + 7(4) + 6 = 50