已知 如图y=x/m与y=ax+b的图像交于A(2,4)B(-8,n)两点 且AB∥DC,C点是y=kx与y=m/x在第一象限的交点.求三个函数解析式及C点坐标.根据图像可知,当x-------时,kx<m/x<ax+b.x轴上是否存在点P,使PA+PC最短,若存
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![已知 如图y=x/m与y=ax+b的图像交于A(2,4)B(-8,n)两点 且AB∥DC,C点是y=kx与y=m/x在第一象限的交点.求三个函数解析式及C点坐标.根据图像可知,当x-------时,kx<m/x<ax+b.x轴上是否存在点P,使PA+PC最短,若存](/uploads/image/z/13387845-21-5.jpg?t=%E5%B7%B2%E7%9F%A5+%E5%A6%82%E5%9B%BEy%3Dx%2Fm%E4%B8%8Ey%3Dax%2Bb%E7%9A%84%E5%9B%BE%E5%83%8F%E4%BA%A4%E4%BA%8EA%282%2C4%29B%28-8%2Cn%29%E4%B8%A4%E7%82%B9+%E4%B8%94AB%E2%88%A5DC%2CC%E7%82%B9%E6%98%AFy%3Dkx%E4%B8%8Ey%3Dm%2Fx%E5%9C%A8%E7%AC%AC%E4%B8%80%E8%B1%A1%E9%99%90%E7%9A%84%E4%BA%A4%E7%82%B9.%E6%B1%82%E4%B8%89%E4%B8%AA%E5%87%BD%E6%95%B0%E8%A7%A3%E6%9E%90%E5%BC%8F%E5%8F%8AC%E7%82%B9%E5%9D%90%E6%A0%87.%E6%A0%B9%E6%8D%AE%E5%9B%BE%E5%83%8F%E5%8F%AF%E7%9F%A5%2C%E5%BD%93x-------%E6%97%B6%2Ckx%EF%BC%9Cm%2Fx%EF%BC%9Cax%2Bb.x%E8%BD%B4%E4%B8%8A%E6%98%AF%E5%90%A6%E5%AD%98%E5%9C%A8%E7%82%B9P%2C%E4%BD%BFPA%2BPC%E6%9C%80%E7%9F%AD%2C%E8%8B%A5%E5%AD%98)
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