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5 September, 12:07

Given f (x) = x^2+3 and g (x) = x+5/x. Find (g o f) (4)

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  1. 5 September, 12:10
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    To find g (f (4)), work from the inside out.

    f (4) is 4^2+3, or 16+3, or 19. Now, we must find g (19).

    This is 19+5/19. This is already a mixed number, though if you want an improper fraction solution, we have:

    361/19+5/19

    Which simplifies to:

    366/19

    Therefore, 366/19 is the answer.
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