需分类讨论操作:正方形ABCD的边长为4,P是直线CD上一动点,将三角形尺的直角顶点与点P重合,一条直角边始终通过点B,另一条直角边所在的直线与射线AD交于点E,设CP=x,DE=y.探究:当点P在CD的延长
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![需分类讨论操作:正方形ABCD的边长为4,P是直线CD上一动点,将三角形尺的直角顶点与点P重合,一条直角边始终通过点B,另一条直角边所在的直线与射线AD交于点E,设CP=x,DE=y.探究:当点P在CD的延长](/uploads/image/z/3894236-44-6.jpg?t=%E9%9C%80%E5%88%86%E7%B1%BB%E8%AE%A8%E8%AE%BA%E6%93%8D%E4%BD%9C%EF%BC%9A%E6%AD%A3%E6%96%B9%E5%BD%A2ABCD%E7%9A%84%E8%BE%B9%E9%95%BF%E4%B8%BA4%2CP%E6%98%AF%E7%9B%B4%E7%BA%BFCD%E4%B8%8A%E4%B8%80%E5%8A%A8%E7%82%B9%2C%E5%B0%86%E4%B8%89%E8%A7%92%E5%BD%A2%E5%B0%BA%E7%9A%84%E7%9B%B4%E8%A7%92%E9%A1%B6%E7%82%B9%E4%B8%8E%E7%82%B9P%E9%87%8D%E5%90%88%2C%E4%B8%80%E6%9D%A1%E7%9B%B4%E8%A7%92%E8%BE%B9%E5%A7%8B%E7%BB%88%E9%80%9A%E8%BF%87%E7%82%B9B%2C%E5%8F%A6%E4%B8%80%E6%9D%A1%E7%9B%B4%E8%A7%92%E8%BE%B9%E6%89%80%E5%9C%A8%E7%9A%84%E7%9B%B4%E7%BA%BF%E4%B8%8E%E5%B0%84%E7%BA%BFAD%E4%BA%A4%E4%BA%8E%E7%82%B9E%2C%E8%AE%BECP%3Dx%2CDE%3Dy.%E6%8E%A2%E7%A9%B6%EF%BC%9A%E5%BD%93%E7%82%B9P%E5%9C%A8CD%E7%9A%84%E5%BB%B6%E9%95%BF)
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