.如图,已知:△ABC中,AB=5,BC=3,AC=4,PQ//AB,P点在AC上(与点A、C不重合),Q点在BC上.(l)当△PQC的面积与四边形PABQ的面积相等时,求CP的长;(2)当△PQC的周长与四边形PABQ的周长相等时,求CP

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