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18 February, 14:44

If f (x) = x2 and g (x) = 3x + 1, which expression represents g (f (x)) ?

A) 3x^3 + x2

B) 3x^2 + 1

C) 9x^3 + 6x2 + x

D) 9x^2 + 6x + 1

E) 9x^2 + 1

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Answers (1)
  1. 18 February, 15:11
    0
    F (x) = x²

    g (x) = 3x+1

    g (f (x)) = g (x²) = 3x²+1 - we just put x² instead of x

    ans.: B

    Regards, M. Y.
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