如图,在矩形ABCD中,AD=4,AB=3.P是AD边上任意一点,PE垂直BD,PF垂直AC,E,F分别是垂足,求PE+PF的值.
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![如图,在矩形ABCD中,AD=4,AB=3.P是AD边上任意一点,PE垂直BD,PF垂直AC,E,F分别是垂足,求PE+PF的值.](/uploads/image/z/5525552-56-2.jpg?t=%E5%A6%82%E5%9B%BE%2C%E5%9C%A8%E7%9F%A9%E5%BD%A2ABCD%E4%B8%AD%2CAD%3D4%2CAB%3D3.P%E6%98%AFAD%E8%BE%B9%E4%B8%8A%E4%BB%BB%E6%84%8F%E4%B8%80%E7%82%B9%2CPE%E5%9E%82%E7%9B%B4BD%2CPF%E5%9E%82%E7%9B%B4AC%2CE%2CF%E5%88%86%E5%88%AB%E6%98%AF%E5%9E%82%E8%B6%B3%2C%E6%B1%82PE%2BPF%E7%9A%84%E5%80%BC.)
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