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15 October, 04:09

If f (x) = _4x _ 1, find f (_2)

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  1. 15 October, 04:22
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    The answer is 7

    f (x) = - 4x - 1

    f (-2) = ?

    Since f (x) = f (-2), then x = - 2. Now just substitute x in the function:

    f (-2) = (-4) * (-2) - 1

    f (-2) = 8 - 1

    f (-2) = 7
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