已知在梯形ABCD中,AB平行DC,AD=2PD,PC=2PB,∠ADP=∠PCD(1)求证:PD∥BC;(2)若点Q在线段PB上运动,与点P不重合,连接CQ并延长交DP的延长线于点O,如图2,设PQ=x,DO=y,求y与x的函数关系式,并写出它的定义
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![已知在梯形ABCD中,AB平行DC,AD=2PD,PC=2PB,∠ADP=∠PCD(1)求证:PD∥BC;(2)若点Q在线段PB上运动,与点P不重合,连接CQ并延长交DP的延长线于点O,如图2,设PQ=x,DO=y,求y与x的函数关系式,并写出它的定义](/uploads/image/z/8011842-42-2.jpg?t=%E5%B7%B2%E7%9F%A5%E5%9C%A8%E6%A2%AF%E5%BD%A2ABCD%E4%B8%AD%2CAB%E5%B9%B3%E8%A1%8CDC%2CAD%3D2PD%2CPC%3D2PB%2C%E2%88%A0ADP%3D%E2%88%A0PCD%EF%BC%881%EF%BC%89%E6%B1%82%E8%AF%81%EF%BC%9APD%E2%88%A5BC%EF%BC%9B%EF%BC%882%EF%BC%89%E8%8B%A5%E7%82%B9Q%E5%9C%A8%E7%BA%BF%E6%AE%B5PB%E4%B8%8A%E8%BF%90%E5%8A%A8%2C%E4%B8%8E%E7%82%B9P%E4%B8%8D%E9%87%8D%E5%90%88%2C%E8%BF%9E%E6%8E%A5CQ%E5%B9%B6%E5%BB%B6%E9%95%BF%E4%BA%A4DP%E7%9A%84%E5%BB%B6%E9%95%BF%E7%BA%BF%E4%BA%8E%E7%82%B9O%2C%E5%A6%82%E5%9B%BE2%2C%E8%AE%BEPQ%3Dx%2CDO%3Dy%2C%E6%B1%82y%E4%B8%8Ex%E7%9A%84%E5%87%BD%E6%95%B0%E5%85%B3%E7%B3%BB%E5%BC%8F%2C%E5%B9%B6%E5%86%99%E5%87%BA%E5%AE%83%E7%9A%84%E5%AE%9A%E4%B9%89)
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