导读 【解答】解:(1)当AP=12时,AP•PQ=36,∴PQ=3,又 在Rt△BPQ中,tanB=34,∴PQPB=34,∴PB=4.∴AB=16.(2)若AP=x,则PB=16-x,PQ=34...
【解答】解:(1)当AP=12时,AP•PQ=36,∴PQ=3,又∵在Rt△BPQ中,tanB=34,∴PQPB=34,∴PB=4.∴AB=16.(2)若AP=x,则PB=16-x,PQ=34(16-x),∴y=34(16-x)x,整理得y=-34(x-8)2+48.∴当x=8时,y最大值=48.