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8 June, 07:52

If f (x) = 2x2 1, what is f (x) when x = 3? a 1 b 7 c 13 d 19 9 of 50

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  1. 8 June, 09:04
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    F (x) = 2x² + 1

    f (x) when x = 3, in the expression (2x² + 1), we substitute x = 3

    f (3) = 2 * (3) ² + 1 = 2*9 + 1 = 18 + 1 = 19

    Therefore f (x) = 19
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