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4 September, 13:21

Given f (x) = 4x+1 and g (x) = x^2-2 which of the following is an expression for f (g (x))

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  1. 4 September, 13:31
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    put in g (x) everywhere you see x in f (x)

    f (x) = 4x+1

    substitute x^2-2 for x in the above equation

    f (g (x)) = 4 (x^2-2) + 1

    = 4x^2 - 8 + 1

    = 4x^2 - 7
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