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yi ge jie lun lian xu liang nian zai shan dong gao kao shu xue ya zhou ti zhong de ying yong
Author(s): 
Pages: 56-57
Year: Issue:  6
Journal: ZHONGXUE SHUXUE ZAZHI(GAOZHONG BAN)

Abstract:  结论 A,B为椭圆x2/a2+y2/b2+1(a,b>0)上任点两点,O为椭圆的中心,若OA⊥OB,则1/|OA|2+1/|OB|2=1/a2+1/b2.
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