lim(x^2-1/x-1)=?(x趋近于无穷大)
问题描述：
lim(x^2-1/x-1)=?(x趋近于无穷大)
求极限···
答
你应该是问lim[x→∞] (x²-1)/(x-1)=lim[x→∞] (x+1)(x-1)/(x-1)=lim[x→∞] (x+1)=∞+1=∞或lim[x→∞] (x²-1)/(x-1)=lim[x→∞] (1-1/x²)/(1/x-1/x²)=(1-0)/(0-0)=1/0=∞∴极限不存在...