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i have this queston to do which says..

*)A particle moves in a elliptic orbit under the influence of a central force F= -k/r^2.Prove that the product of the maximim and minimum speeds is equal to [2 pi a/t]^2 where 'a' is the semi major axis of the ellipse and 't' is the period of its motion..

Dont u think it should be the semi minor axis 'b' instead of the semi major axis 'a'..in the question..because im getting the former as the right answer..

please help!!

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# Is this question right?

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