28. Jika π(π₯) = π₯^2 + 2π₯ dan π(π₯) = π₯ β 1, nilai (π π π)(8)= ...
a. 63
b. 62
c. 61
d. 60
e. 59
Jawaban :
π(π₯) = π₯^2 + 2π₯
π(π₯) = π₯ β 1
(π π π)(8) = f (g (8))
(π π π)(8) = f (8 - 1)
(π π π)(8) = f (7)
(π π π)(8) = 7^2 + 2 (7)
(π π π)(8) = 49 + 14
(π π π)(8) = 63
Jawaban : A
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