梯形ABCD中,AD//CD,∠ABC=90°,AD=3,BC=4,AB=a,在线段BC上任意取一点P,连接DP,作射线PE⊥PD,PE与AB交E(1)试确定CP=1时,点E的位置(2)若设CP=x,BE=y,试写出y关于自变量x的函数关系式(3)若在线段BC上能找
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![梯形ABCD中,AD//CD,∠ABC=90°,AD=3,BC=4,AB=a,在线段BC上任意取一点P,连接DP,作射线PE⊥PD,PE与AB交E(1)试确定CP=1时,点E的位置(2)若设CP=x,BE=y,试写出y关于自变量x的函数关系式(3)若在线段BC上能找](/uploads/image/z/5552744-32-4.jpg?t=%E6%A2%AF%E5%BD%A2ABCD%E4%B8%AD%2CAD%2F%2FCD%2C%E2%88%A0ABC%3D90%C2%B0%2CAD%3D3%2CBC%3D4%2CAB%3Da%2C%E5%9C%A8%E7%BA%BF%E6%AE%B5BC%E4%B8%8A%E4%BB%BB%E6%84%8F%E5%8F%96%E4%B8%80%E7%82%B9P%2C%E8%BF%9E%E6%8E%A5DP%2C%E4%BD%9C%E5%B0%84%E7%BA%BFPE%E2%8A%A5PD%2CPE%E4%B8%8EAB%E4%BA%A4E%EF%BC%881%EF%BC%89%E8%AF%95%E7%A1%AE%E5%AE%9ACP%3D1%E6%97%B6%2C%E7%82%B9E%E7%9A%84%E4%BD%8D%E7%BD%AE%EF%BC%882%EF%BC%89%E8%8B%A5%E8%AE%BECP%3Dx%2CBE%3Dy%2C%E8%AF%95%E5%86%99%E5%87%BAy%E5%85%B3%E4%BA%8E%E8%87%AA%E5%8F%98%E9%87%8Fx%E7%9A%84%E5%87%BD%E6%95%B0%E5%85%B3%E7%B3%BB%E5%BC%8F%EF%BC%883%EF%BC%89%E8%8B%A5%E5%9C%A8%E7%BA%BF%E6%AE%B5BC%E4%B8%8A%E8%83%BD%E6%89%BE)
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