Jika g(x) =2x-5 dan (f•g) (x) = 6x-13 maka f(3)
Matematika
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Pertanyaan
Jika g(x) =2x-5 dan (f•g) (x) = 6x-13 maka f(3)
1 Jawaban
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1. Jawaban Anonyme
g (x) = 2x - 5
fog (x) = 6x - 13
f (g (x)) = 6x - 13
f (2x - 5) = 6x - 13
f (2x - 5) = f (3)
2x - 5 = 3
2x = 3 + 5
2x = 8
x = 8/2
x = 4
Nilai f (3)
= 6x - 13
= 6 (4) - 13
= 24 - 13
= 11