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**mathdrop****Member**- Registered: 2022-03-07
- Posts: 73

Give me the curvature of xy=1 in every point.

Why can't we take the second derivative of it ?

My solution would probably be to rotate it 45° counter-clockwise,

take the second derivative

find the relation it has with the unaltered equation

and transform it back.

Is there something out there, which is more handy ?

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