Problem B7:
A planet is orbiting a star of mass M. The orbit of the planet is an
ellipse. The maximum distance from the sun during the elliptical orbit is
n_{1}r, and the minimum distance from the sun is n_{2}.
If the speed squared at the maximum distance is v_{1}^{2}=GM/(n_{3}r),
what is n_{3}? Note that all the integers are unitless.

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