X趋于∞时lim√(x²+1)-√(x²-1)=?

问题描述:

X趋于∞时lim√(x²+1)-√(x²-1)=?

lim[√(x²+1)-√(x²-1)]
=lim[(x²+1)-(x²-1)]/[√(x²+1)+√(x²-1)]
=lim2/[√(x²+1)+√(x²-1)]
=0