Kisi Kisi PAT Matematika Kelas XI no 23

23. Jika 𝑓(𝑥) = 3𝑥 + 2 dan 𝑔(𝑥) = 2 − 𝑥, maka (𝑓 𝑜 𝑔)(𝑥)= ...

A. 3𝑥 + 8

B. 3𝑥 − 8

C. −3𝑥 + 8

D. 3𝑥 + 2

E. 3𝑥 − 2

Jawaban :

𝑓(𝑥) = 3𝑥 + 2

𝑔(𝑥) = 2 − 𝑥

(𝑓 𝑜 𝑔)(𝑥) = f (g (x) )

(𝑓 𝑜 𝑔)(𝑥) = f (2 - x)

(𝑓 𝑜 𝑔)(𝑥) = 3 (2 - x) + 2

(𝑓 𝑜 𝑔)(𝑥) = 6 - 3x + 2

(𝑓 𝑜 𝑔)(𝑥) = 8 - 3x

(𝑓 𝑜 𝑔)(𝑥) = - 3x + 8

Jawaban : C