jika f(x) = 2x + 3 dan (fog)(x) = x^2 - 2x + 1 maka g(-3) = ...
Matematika
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Pertanyaan
jika f(x) = 2x + 3 dan (fog)(x) = x^2 - 2x + 1 maka g(-3) = ...
1 Jawaban
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1. Jawaban Ashiela
f(x) = 2x + 3
(f•g)(x) = x² - 2x + 1
f(g(x)) = x² - 2x + 1
2g(x) + 3 = x² - 2x + 1
2g(x) = x² - 2x - 2
g(x) = ½x² - x - 1
g(3) = ½(3²) - 3 - 1 = 9/2 - 4 = ½