f(x)=3x-1 , g(x)=2x²+3 , (g°f)(1)=.......?
Matematika
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Pertanyaan
f(x)=3x-1 , g(x)=2x²+3 , (g°f)(1)=.......?
2 Jawaban
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1. Jawaban uglypeanut
f(x) = 3x-1
g(x) = 2x²+3
(g ° f)(x) = 2(3x-1)² + 3
= 2(9x² - 6x + 1) + 3
= 18x² - 12x + 2 + 3
= 18x² - 12x + 5
(g ° f)(1) = 18(1)² - 12(1) + 5
= 18 - 12 + 5
= 11 -
2. Jawaban Nuagra
f(1)= 2
g[f(1)]= g(2) = 2 x 2^2 + 3
= 11