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1 October, 12:27

Find the derivative of f (x) = 7 divided by x at x = 1.

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  1. 1 October, 12:51
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    I find it best to switch everything exponents when taking derivatives.

    F (x) = 7/x

    Same as ...

    F (x) = 7x^-1

    Take derivative ...

    F' (x) = - 7x^-2

    Plug in x = 1

    F' (1) = - 7 (1) ^-2

    F' (1) = - 7
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