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May 12 Sun 2013 13:30
幾題簡單的橢圓問題::

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幾題簡單的橢圓問題:

May 12th 2013, 05:16

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幾題簡單的橢圓問題

May 11th 2013, 01:18

1.假設橢圓之長軸平行於x軸或y軸,且滿足下列條件,求其方程式:
(1)中心和原點重合,y軸為長軸,正焦弦長是2,二焦點距離2√ 2
(2)焦點為(-1,1),(7,1),長軸之二端點為(-2,1),(8,1)
(2)焦點為(-1,1),(7,1),長軸之二端點(-2,1),(8,1)
(3)長軸方程式x=5,短軸方程式y=1,短軸為長軸之3/5倍,且中心到焦點之距離為12

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