Homework Statement
For an elliptic movement, calculate the mean value for a period of \left( \frac{a}{r} \right)^k , with k = 1,2,3,4,5 and being a the major radius. i.e. calculate
\frac{1}{2 \pi} \int_0^{2 \pi} \left( \frac{a}{r} \right)^k dl,
being l the mean anomaly.
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