已知两个关于X的二次函数Y1与Y2,Y1=a(x-k)V2+2(k大于0),y1+y2=Xv2+6x+12.当X=K时,Y2=17;且二次函数Y2V代表几次方求K的值. 2.Y1,Y2的表达式已知两个关于X的二次函数Y1与Y2,Y1=a(x-k)V2+2(k大于0),y1+y2=Xv2
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![已知两个关于X的二次函数Y1与Y2,Y1=a(x-k)V2+2(k大于0),y1+y2=Xv2+6x+12.当X=K时,Y2=17;且二次函数Y2V代表几次方求K的值. 2.Y1,Y2的表达式已知两个关于X的二次函数Y1与Y2,Y1=a(x-k)V2+2(k大于0),y1+y2=Xv2](/uploads/image/z/1488717-45-7.jpg?t=%E5%B7%B2%E7%9F%A5%E4%B8%A4%E4%B8%AA%E5%85%B3%E4%BA%8EX%E7%9A%84%E4%BA%8C%E6%AC%A1%E5%87%BD%E6%95%B0Y1%E4%B8%8EY2%2CY1%3Da%28x-k%29V2%2B2%EF%BC%88k%E5%A4%A7%E4%BA%8E0%EF%BC%89%2Cy1%2By2%3DXv2%2B6x%2B12.%E5%BD%93X%3DK%E6%97%B6%2CY2%3D17%3B%E4%B8%94%E4%BA%8C%E6%AC%A1%E5%87%BD%E6%95%B0Y2V%E4%BB%A3%E8%A1%A8%E5%87%A0%E6%AC%A1%E6%96%B9%E6%B1%82K%E7%9A%84%E5%80%BC.++++2.Y1%2CY2%E7%9A%84%E8%A1%A8%E8%BE%BE%E5%BC%8F%E5%B7%B2%E7%9F%A5%E4%B8%A4%E4%B8%AA%E5%85%B3%E4%BA%8EX%E7%9A%84%E4%BA%8C%E6%AC%A1%E5%87%BD%E6%95%B0Y1%E4%B8%8EY2%2CY1%3Da%28x-k%29V2%2B2%EF%BC%88k%E5%A4%A7%E4%BA%8E0%EF%BC%89%EF%BC%8Cy1%2By2%3DXv2)
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