已知双曲线x2/64-y2/36=1的焦点为F1,F2,直线过F1交双曲线的左支于A,B两点,【AB】=m,求三角形ABF2周长http://zhidao.baidu.com/question/50058563.html?fr=qrl&cid=193&index=4这个回答里的|AF2|+|BF2|-(|AF1|+|BF1|)=4a=32是怎
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![已知双曲线x2/64-y2/36=1的焦点为F1,F2,直线过F1交双曲线的左支于A,B两点,【AB】=m,求三角形ABF2周长http://zhidao.baidu.com/question/50058563.html?fr=qrl&cid=193&index=4这个回答里的|AF2|+|BF2|-(|AF1|+|BF1|)=4a=32是怎](/uploads/image/z/5302530-18-0.jpg?t=%E5%B7%B2%E7%9F%A5%E5%8F%8C%E6%9B%B2%E7%BA%BFx2%2F64-y2%2F36%3D1%E7%9A%84%E7%84%A6%E7%82%B9%E4%B8%BAF1%2CF2%2C%E7%9B%B4%E7%BA%BF%E8%BF%87F1%E4%BA%A4%E5%8F%8C%E6%9B%B2%E7%BA%BF%E7%9A%84%E5%B7%A6%E6%94%AF%E4%BA%8EA%2CB%E4%B8%A4%E7%82%B9%2C%E3%80%90AB%E3%80%91%3Dm%2C%E6%B1%82%E4%B8%89%E8%A7%92%E5%BD%A2ABF2%E5%91%A8%E9%95%BFhttp%3A%2F%2Fzhidao.baidu.com%2Fquestion%2F50058563.html%3Ffr%3Dqrl%26cid%3D193%26index%3D4%E8%BF%99%E4%B8%AA%E5%9B%9E%E7%AD%94%E9%87%8C%E7%9A%84%7CAF2%7C%2B%7CBF2%7C-%28%7CAF1%7C%2B%7CBF1%7C%29%3D4a%3D32%E6%98%AF%E6%80%8E)
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