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20 March, 18:35

Consider the functions f (x) = x2 - 13 and g (x) = x + 5. What is the value of f[g (-4) ]?

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  1. 20 March, 19:43
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    First find g (-4)

    so:

    g (-4) = (-4) + 5

    g (-4) = 1

    then find f (g (-4)) which means to substitute the value of g (-4) in for x in f (x)

    so:

    f (1) = 1^2 - 13

    f (1) = 1 - 13

    f (1) = - 12
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