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6 October, 08:56

F (x) = x2 + 1 What is f (f (x)) ?

a. x4 + 2x2 + 1

b. x4 + 2x2 + 2

c. x4 + 2

d. x4 + 1

+3
Answers (2)
  1. 6 October, 09:37
    0
    B. x^4 + 2x^2 + 2

    (x^2 + 1) ^2 + 1 = f (f (x))

    expand that and we get b
  2. 6 October, 10:21
    0
    F (f (x)) equals x^4 + 2x^2 + 2
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