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5 June, 22:26

Let f (x) = x2 and g (x) = x - 3. Evaluate the expression (g ° g) (7)

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  1. 6 June, 00:31
    0
    This is a function composition with g (x) composed with g (x), then evaluated at 7.

    g (g (x)) =

    g (x - 3) =

    x - 3 - 3 =

    x - 6 =

    7 - 6 = 1

    OR

    You could but 7 in the g (x) function. Get that result, and put it in g (x) again.

    g (7) = 7 - 3 = 4

    g (4) = 4 - 3 = 1

    Either way, the answer is 1
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