?x1x2?y1y2?x1x2?(?x1?1)(?x2?1)?2x1x2?(x1?x2)?1?02a2(1?b2)2a2?2?2?1?0 整理得:a2?b2?2a2b2?0 22a?ba?b?b2?a2?c2?a2?a2e2
代入上式得?a?21112(1?)2a?1? 21?e21?e2
?e?(22,1)
?a2?32满足???式
2a?6 ?
?x1x2?y1y2?x1x2?(?x1?1)(?x2?1)?2x1x2?(x1?x2)?1?02a2(1?b2)2a2?2?2?1?0 整理得:a2?b2?2a2b2?0 22a?ba?b?b2?a2?c2?a2?a2e2
代入上式得?a?21112(1?)2a?1? 21?e21?e2
?e?(22,1)
?a2?32满足???式
2a?6 ?
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