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10 June, 12:32

For f (x) = -2^x, what is f (-2) ?

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Answers (1)
  1. 10 June, 15:17
    0
    Remark

    The way this is written, the minus sign is not effected by the power (x). In order for x to affect the minus sign, you need to use brackets.

    f (x) = (-2) ^x Since it is not written this way, the answer will be minus

    Formula

    f (x) = - (2) ^x

    Solve

    f (-2) means that x is - 2 where ever you see it

    f (-2) = - (2) ^-2

    f (-2) = - (1/2) ^2

    f (-2) = - (1/4) Answer
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