两条异面直线a,b所成角C,在直线a,b上分别取点A,E和BF,使AB垂直a,AB垂直b,已知AE=m,BF=n,EF=L,求公垂线AB的长,此题是人教高中数学选修2-1,111页的题,答案是两个情况根号下L平方减m平方减n平方加减2mco
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![两条异面直线a,b所成角C,在直线a,b上分别取点A,E和BF,使AB垂直a,AB垂直b,已知AE=m,BF=n,EF=L,求公垂线AB的长,此题是人教高中数学选修2-1,111页的题,答案是两个情况根号下L平方减m平方减n平方加减2mco](/uploads/image/z/6995633-41-3.jpg?t=%E4%B8%A4%E6%9D%A1%E5%BC%82%E9%9D%A2%E7%9B%B4%E7%BA%BFa%2Cb%E6%89%80%E6%88%90%E8%A7%92C%2C%E5%9C%A8%E7%9B%B4%E7%BA%BFa%2Cb%E4%B8%8A%E5%88%86%E5%88%AB%E5%8F%96%E7%82%B9A%2CE%E5%92%8CBF%2C%E4%BD%BFAB%E5%9E%82%E7%9B%B4a%2CAB%E5%9E%82%E7%9B%B4b%2C%E5%B7%B2%E7%9F%A5AE%3Dm%2CBF%3Dn%2CEF%3DL%2C%E6%B1%82%E5%85%AC%E5%9E%82%E7%BA%BFAB%E7%9A%84%E9%95%BF%2C%E6%AD%A4%E9%A2%98%E6%98%AF%E4%BA%BA%E6%95%99%E9%AB%98%E4%B8%AD%E6%95%B0%E5%AD%A6%E9%80%89%E4%BF%AE2-1%2C111%E9%A1%B5%E7%9A%84%E9%A2%98%2C%E7%AD%94%E6%A1%88%E6%98%AF%E4%B8%A4%E4%B8%AA%E6%83%85%E5%86%B5%E6%A0%B9%E5%8F%B7%E4%B8%8BL%E5%B9%B3%E6%96%B9%E5%87%8Fm%E5%B9%B3%E6%96%B9%E5%87%8Fn%E5%B9%B3%E6%96%B9%E5%8A%A0%E5%87%8F2mco)
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