- #1

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## Main Question or Discussion Point

for a curve defined by y=f(x) the radius of curvature is defined as

[f""(x)/(1+f"(x))] power 3/2. I need a good neat & understandable derivation for that. can any body show a web.

[f""(x)/(1+f"(x))] power 3/2. I need a good neat & understandable derivation for that. can any body show a web.