Curvature and Radius of Curvature for a function of x.

This video explains how to determine curvature using short cut formula for a function of x.

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Ex: Determine Concavity and Points of Inflection – f(x)=x^2*e^(4x)

This video explains how to determine the open intervals for which a function is concave up or concave down.  The points of inflection are also found.