如图,在△ABC中,∠ACB=90°,AB=5,BC=3,P是AB边上的动点(不与点B重

如图,在△ABC中,∠ACB=90°,AB=5,BC=3,P是AB边上的动点(不与点B重合),将△BCP沿CP所在的直线翻折,得到△B′CP,连接B′A,则B′A长度的最小值是               .

 


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