lim[2n+(an^2-2n+1)/(bn+2)]=1,则点(a,b)坐标为
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lim[2n+(an^2-2n+1)/(bn+2)]=1,则点(a,b)坐标为lim[2n+(an^2-2n+1)/(bn+2)]=1,则点(a,b)坐标为lim[2n+(an^2-2n+1)/(bn
lim[2n+(an^2-2n+1)/(bn+2)]=1,则点(a,b)坐标为
lim[2n+(an^2-2n+1)/(bn+2)]=1,则点(a,b)坐标为
lim[2n+(an^2-2n+1)/(bn+2)]=1,则点(a,b)坐标为
(4,-2)
将式子2n+(an^2-2n+1)/(bn+2)]除n,取极限为0
得到a=-2b带入式子得到b=-2
得a=4
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