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17 May, 16:48

If f (x) = 3x² + 1 and g (x) = 1 - X, what is the value of (f - 9) (2) ?

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  1. 17 May, 17:44
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    (f - g) (2) = 14

    Step-by-step explanation:

    You can write the expression for the composite function as ...

    (f - g) (x) = f (x) - g (x) = (3x² + 1) - (1 - x)

    (f - g) (x) = 3x² + x

    Then for x = 2 ...

    (f - g) (2) = 3 (2²) + 2

    (f - g) (2) = 14
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