四棱锥P-ABCD中,底面ABCD为梯形,AD//BC,AB=AD=BC/2,∠ABC=60度,平面PAB⊥平面ABCD,PA⊥PB是否存在一点Q,使得点Q到棱锥所有顶点的距离相等
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![四棱锥P-ABCD中,底面ABCD为梯形,AD//BC,AB=AD=BC/2,∠ABC=60度,平面PAB⊥平面ABCD,PA⊥PB是否存在一点Q,使得点Q到棱锥所有顶点的距离相等](/uploads/image/z/6255231-15-1.jpg?t=%E5%9B%9B%E6%A3%B1%E9%94%A5P-ABCD%E4%B8%AD%2C%E5%BA%95%E9%9D%A2ABCD%E4%B8%BA%E6%A2%AF%E5%BD%A2%2CAD%2F%2FBC%2CAB%3DAD%3DBC%2F2%2C%E2%88%A0ABC%3D60%E5%BA%A6%2C%E5%B9%B3%E9%9D%A2PAB%E2%8A%A5%E5%B9%B3%E9%9D%A2ABCD%2CPA%E2%8A%A5PB%E6%98%AF%E5%90%A6%E5%AD%98%E5%9C%A8%E4%B8%80%E7%82%B9Q%2C%E4%BD%BF%E5%BE%97%E7%82%B9Q%E5%88%B0%E6%A3%B1%E9%94%A5%E6%89%80%E6%9C%89%E9%A1%B6%E7%82%B9%E7%9A%84%E8%B7%9D%E7%A6%BB%E7%9B%B8%E7%AD%89)
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