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henpen

  • 3 years ago

\[y^2=2px\] \[ \Rightarrow 2ydy=2pdx \] How is this achieved at? I've always gone with calculating \[ 2y\frac{dy}{dx}=2p \] and multiplying both sides by dx. But I know that's heresy. What's the official story as to how it's arrived at?

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  1. henpen
    • 3 years ago
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    I've always found it odd how it seems plucked out of thin air

  2. Jonask
    • 3 years ago
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    here is a link this is called differentials chew on it

  3. henpen
    • 3 years ago
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    Oh differentials- I wasn't thinking!

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