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Thread: What does this notation mean? Leibniz's notation for second derivative?

  1. March 9th 2011, 09:29 PM #1
    Tim92
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    What does this notation mean? Leibniz's notation for second derivative?

    Hi everyone,

    I have come across the following notation and I'm not sure what it means:
    What does this notation mean? Leibniz's notation for second derivative?-msp1015219ef3f8de7edc03g00002194dceigi23di1c.gif

    I thought it meant the second derivative but I have only ever seen that denoted:
    What does this notation mean? Leibniz's notation for second derivative?-msp649219ef3cf051fac31a000046i2944a8i9fgd60.gif

    Can anyone help me out here?

    Thanks, Tim.
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  2. March 10th 2011, 02:23 AM #2
    HallsofIvy
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    It doesn't mean anything. It is probably a misprint for the second derivativel,
    \frac{d^2y}{dx^2}

    The other possibility is that it is a misprint for
    \frac{dy^2}{dx}= 2y\frac{dy}{dx}.
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