在长方形ABCD-A1B1C1D1中,AD=AA1=1,AB=2,点E在棱AB上移动.(1)D1E⊥A1D;(2)当E为AB的中点时,求点E到平面ACD1的距离;(2)AE为何值时,二面角D1-EC-D的大小为45°
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![在长方形ABCD-A1B1C1D1中,AD=AA1=1,AB=2,点E在棱AB上移动.(1)D1E⊥A1D;(2)当E为AB的中点时,求点E到平面ACD1的距离;(2)AE为何值时,二面角D1-EC-D的大小为45°](/uploads/image/z/11679737-41-7.jpg?t=%E5%9C%A8%E9%95%BF%E6%96%B9%E5%BD%A2ABCD-A1B1C1D1%E4%B8%AD%2CAD%3DAA1%3D1%2CAB%3D2%2C%E7%82%B9E%E5%9C%A8%E6%A3%B1AB%E4%B8%8A%E7%A7%BB%E5%8A%A8.%EF%BC%881%EF%BC%89D1E%E2%8A%A5A1D%EF%BC%9B%EF%BC%882%EF%BC%89%E5%BD%93E%E4%B8%BAAB%E7%9A%84%E4%B8%AD%E7%82%B9%E6%97%B6%2C%E6%B1%82%E7%82%B9E%E5%88%B0%E5%B9%B3%E9%9D%A2ACD1%E7%9A%84%E8%B7%9D%E7%A6%BB%EF%BC%9B%EF%BC%882%EF%BC%89AE%E4%B8%BA%E4%BD%95%E5%80%BC%E6%97%B6%2C%E4%BA%8C%E9%9D%A2%E8%A7%92D1-EC-D%E7%9A%84%E5%A4%A7%E5%B0%8F%E4%B8%BA45%C2%B0)
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