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OpenStudy (anonymous):

If f''(a)=0 then x=a is a point of inflexion (true or false)?

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OpenStudy (anonymous):

not necessarily. it means the curvature changes. for instance if you have a positive coefficient parabola, the curvature is upwards. at the minimum, the first derivative is = 0 but the curvature never changes

OpenStudy (anonymous):

k thanks

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