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5 May, 07:43

If f (x) = 2x2 + 1, what is f (x) when x = 3? 1 7 13 19

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  1. 5 May, 11:24
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    F (x) = 2x² + 1

    f (3) = 2 (3) ² + 1

    f (3) = 2 (9) + 1

    f (3) = 18 + 1

    f (3) = 19

    The answer is D.
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