一道数学高考几何题.正方体ABCD-A1B1C1D1的棱长为2,动点E.F在棱上,动点P.Q分别在棱AD,CD上,若EF为1,A1E为x,DQ为y,DP为z(x,y,z大于0),则四面体PEFQ的体积是否与x,y,z,有关?原图可能有误.不过卷子上就是
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![一道数学高考几何题.正方体ABCD-A1B1C1D1的棱长为2,动点E.F在棱上,动点P.Q分别在棱AD,CD上,若EF为1,A1E为x,DQ为y,DP为z(x,y,z大于0),则四面体PEFQ的体积是否与x,y,z,有关?原图可能有误.不过卷子上就是](/uploads/image/z/2761681-49-1.jpg?t=%E4%B8%80%E9%81%93%E6%95%B0%E5%AD%A6%E9%AB%98%E8%80%83%E5%87%A0%E4%BD%95%E9%A2%98.%E6%AD%A3%E6%96%B9%E4%BD%93ABCD-A1B1C1D1%E7%9A%84%E6%A3%B1%E9%95%BF%E4%B8%BA2%2C%E5%8A%A8%E7%82%B9E.F%E5%9C%A8%E6%A3%B1%E4%B8%8A%2C%E5%8A%A8%E7%82%B9P.Q%E5%88%86%E5%88%AB%E5%9C%A8%E6%A3%B1AD%2CCD%E4%B8%8A%2C%E8%8B%A5EF%E4%B8%BA1%2CA1E%E4%B8%BAx%2CDQ%E4%B8%BAy%2CDP%E4%B8%BAz%EF%BC%88x%2Cy%2Cz%E5%A4%A7%E4%BA%8E0%EF%BC%89%2C%E5%88%99%E5%9B%9B%E9%9D%A2%E4%BD%93PEFQ%E7%9A%84%E4%BD%93%E7%A7%AF%E6%98%AF%E5%90%A6%E4%B8%8Ex%2Cy%2Cz%2C%E6%9C%89%E5%85%B3%3F%E5%8E%9F%E5%9B%BE%E5%8F%AF%E8%83%BD%E6%9C%89%E8%AF%AF.%E4%B8%8D%E8%BF%87%E5%8D%B7%E5%AD%90%E4%B8%8A%E5%B0%B1%E6%98%AF)
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