e is half-distance between two foci


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送交者: HunHunSheng 于 2009-03-12, 14:27:53:

回答: 我根据椭圆是到固定两点之和等于常数的连续轨迹得出了椭圆方程 由 HunHunSheng 于 2009-03-12, 14:24:07:

I assume e^2=a^2-b^2 but I am not sure if I can
make thi sasumtion purley based upon 椭圆是到固
定两点之和等于常数的连续轨迹.

In fact, we don't even know if major and minor axis exist before we get the equation first.

So it is a chicken and egg problem




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