依题意得:
设y1=k1x,y2=k2/9x^2,则y=k1x+k2/x^2,把数据代入得:3k1+k2/9=11,6k1+k2/36=29解得:
k1=5,k2=-36
所以y=5x-36/x^2
(2)把x=√3代入得:y=5×√3-36/√3^2=5√3-12
依题意得:
设y1=k1x,y2=k2/9x^2,则y=k1x+k2/x^2,把数据代入得:3k1+k2/9=11,6k1+k2/36=29解得:
k1=5,k2=-36
所以y=5x-36/x^2
(2)把x=√3代入得:y=5×√3-36/√3^2=5√3-12