如图所示,过点F(0,1)的直线y=kx+b与抛物线 y=1/4x^2交于M(x1,y1)和N(x2,y2)两点(其中x1<0,x2
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![如图所示,过点F(0,1)的直线y=kx+b与抛物线 y=1/4x^2交于M(x1,y1)和N(x2,y2)两点(其中x1<0,x2](/uploads/image/z/11534656-40-6.jpg?t=%E5%A6%82%E5%9B%BE%E6%89%80%E7%A4%BA%2C%E8%BF%87%E7%82%B9F%EF%BC%880%2C1%EF%BC%89%E7%9A%84%E7%9B%B4%E7%BA%BFy%3Dkx%2Bb%E4%B8%8E%E6%8A%9B%E7%89%A9%E7%BA%BF+y%3D1%2F4x%5E2%E4%BA%A4%E4%BA%8EM%EF%BC%88x1%2Cy1%EF%BC%89%E5%92%8CN%EF%BC%88x2%2Cy2%EF%BC%89%E4%B8%A4%E7%82%B9%EF%BC%88%E5%85%B6%E4%B8%ADx1%EF%BC%9C0%2Cx2)
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