diketahui f(x)= 2x+3 dan g(x)=x²+x-2, maka nilai (gof) (-4)=
Matematika
30retno
Pertanyaan
diketahui f(x)= 2x+3 dan g(x)=x²+x-2, maka nilai (gof) (-4)=
2 Jawaban
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1. Jawaban dewa251202
Bab Fungsi
(g o f)(-4)
= g(f(-4))
= g(2(-4) + 3)
= g(-8 + 3)
= g(-5)
= (-5)^2 + (-5) - 2
= 25 - 5 - 2
= 18 -
2. Jawaban 18Navillera
(gof)(x) = (2x + 3)^2 + (2x+3) - 2
(gof)(x) = 4x^2 + 12x + 9 + 2x + 1
(gof)(x) = 4x^2 + 14x + 10
(gof)(-4) = 4(-4)^2 + 14(-4) + 10
(gof)(-4) = 64 - 56 + 10
(gof)(-4) = 18