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Thread: Need some basic differentiation help please

  1. January 25th 2011, 09:28 PM #1
    Anthony1994
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    Need some basic differentiation help please

    I apologize if I'm posting in the wrong section.

    Question:

    Find the gradient of the curve y = 5/x^4 at the point where x = 2.

    Thanks in advance.
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  2. January 25th 2011, 09:46 PM #2
    Unknown008
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    1. Find \dfrac{dy}{dx}

    2. Put x = 2 in \dfrac{dy}{dx}

    3. Simplify.

    That's it
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  3. January 25th 2011, 09:46 PM #3
    Sambit
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    y=5x^{-4}
    \frac{dy}{dx}=5(-4)x^{-4-1}<br /> = -20x^{-5}
    Now put x=2.
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