如图,直线y=-x+m与双曲线y=3/x交于点P,与x轴,y轴交于B、A两点,则PA*PB=
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![如图,直线y=-x+m与双曲线y=3/x交于点P,与x轴,y轴交于B、A两点,则PA*PB=](/uploads/image/z/5285338-34-8.jpg?t=%E5%A6%82%E5%9B%BE%2C%E7%9B%B4%E7%BA%BFy%3D-x%2Bm%E4%B8%8E%E5%8F%8C%E6%9B%B2%E7%BA%BFy%3D3%2Fx%E4%BA%A4%E4%BA%8E%E7%82%B9P%2C%E4%B8%8Ex%E8%BD%B4%2Cy%E8%BD%B4%E4%BA%A4%E4%BA%8EB%E3%80%81A%E4%B8%A4%E7%82%B9%2C%E5%88%99PA%2APB%3D)
如图,直线y=-x+m与双曲线y=3/x交于点P,与x轴,y轴交于B、A两点,则PA*PB=
如图,直线y=-x+m与双曲线y=3/x交于点P,与x轴,y轴交于B、A两点,则PA*PB=
如图,直线y=-x+m与双曲线y=3/x交于点P,与x轴,y轴交于B、A两点,则PA*PB=
如图,作PC⊥X轴于C,PD⊥Y轴于D,
易知PA=√2PD,PB=√2PC,
∴PA*PB=√2PD*√2PC=2PD*PC,
又∵PD*PC=3,
∴PA*PB=6