lim(x2-4x+5)/2x2-x-1 x→∞
问题描述:
lim(x2-4x+5)/2x2-x-1 x→∞
答
lim(x2-4x+5)/2x2-x-1 分子分母同除以x²,得
=lim(1-4/x+5/x2)/[2-1/x-1/x2]
=1/2