在平面直角坐标系中,抛物线交y轴于A(0,2),交x轴于B、C,BC=5,且OC>OB,连接AB,AC,AB⊥AC.(1)求抛物线解析式(2)若点Q为抛物线上除点B,C上任意一点,当P位于何位置时,使PA+PB取最小值?
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![在平面直角坐标系中,抛物线交y轴于A(0,2),交x轴于B、C,BC=5,且OC>OB,连接AB,AC,AB⊥AC.(1)求抛物线解析式(2)若点Q为抛物线上除点B,C上任意一点,当P位于何位置时,使PA+PB取最小值?](/uploads/image/z/13160226-66-6.jpg?t=%E5%9C%A8%E5%B9%B3%E9%9D%A2%E7%9B%B4%E8%A7%92%E5%9D%90%E6%A0%87%E7%B3%BB%E4%B8%AD%2C%E6%8A%9B%E7%89%A9%E7%BA%BF%E4%BA%A4y%E8%BD%B4%E4%BA%8EA%EF%BC%880%2C2%EF%BC%89%2C%E4%BA%A4x%E8%BD%B4%E4%BA%8EB%E3%80%81C%2CBC%3D5%2C%E4%B8%94OC%EF%BC%9EOB%2C%E8%BF%9E%E6%8E%A5AB%2CAC%2CAB%E2%8A%A5AC.%EF%BC%881%EF%BC%89%E6%B1%82%E6%8A%9B%E7%89%A9%E7%BA%BF%E8%A7%A3%E6%9E%90%E5%BC%8F%EF%BC%882%EF%BC%89%E8%8B%A5%E7%82%B9Q%E4%B8%BA%E6%8A%9B%E7%89%A9%E7%BA%BF%E4%B8%8A%E9%99%A4%E7%82%B9B%2CC%E4%B8%8A%E4%BB%BB%E6%84%8F%E4%B8%80%E7%82%B9%2C%E5%BD%93P%E4%BD%8D%E4%BA%8E%E4%BD%95%E4%BD%8D%E7%BD%AE%E6%97%B6%2C%E4%BD%BFPA%2BPB%E5%8F%96%E6%9C%80%E5%B0%8F%E5%80%BC%3F)
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