30. Jika 𝑓(𝑥) = 2𝑥 − 3 dan (𝑓 𝑜 𝑔)(𝑥) = 8𝑥 − 7 maka 𝑔(𝑥)=...
A. 4𝑥 − 3
B. 4𝑥 − 2
C. 4𝑥 − 1
D. 4𝑥 + 1
E. 4𝑥 + 2
Jawaban :
𝑓(𝑥) = 2𝑥 − 3
(𝑓 𝑜 𝑔)(𝑥) = 8𝑥 − 7
f (g (x)) = 8x - 7
2(g (x)) − 3 = 8x - 7
2 g(x) = 8x - 7 + 3
2 g(x) = 8x - 4
g(x) = 4x - 2
Jawaban : B
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