F1F26的知识精选

已知定点F1、F2,且|F1F2|=6,动点P满足|PF1|-|PF2|=6,则动点P的轨迹是        ...
问题详情:已知定点F1、F2,且|F1F2|=6,动点P满足|PF1|-|PF2|=6,则动点P的轨迹是              A.椭圆                  B.双曲线              C.线段           ...
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