Kisi Kisi PAT Matematika Kelas XI no 28

28. Jika 𝑓(𝑥) = 𝑥^2 + 2𝑥 dan 𝑔(𝑥) = 𝑥 − 1, nilai (𝑓 𝑜 𝑔)(8)= ...

a. 63

b. 62

c. 61

d. 60

e. 59

Jawaban :

𝑓(𝑥) = 𝑥^2 + 2𝑥

𝑔(𝑥) = 𝑥 − 1

(𝑓 𝑜 𝑔)(8) = f (g (8))

(𝑓 𝑜 𝑔)(8) = f (8 - 1)

(𝑓 𝑜 𝑔)(8) = f (7)

(𝑓 𝑜 𝑔)(8) = 7^2 + 2 (7)

(𝑓 𝑜 𝑔)(8) = 49 + 14

(𝑓 𝑜 𝑔)(8) = 63

Jawaban : A