两道函数极限计算题?高数
3个回答
展开全部
① lim(x—>1)(arctanx+π/4)/√(x²+lnx)
=(arctan1+π/4)/√(1²+ln1)
=(π/4+π/4)/√(1+0)
=π/2 ;
② lim(x—>∞)[cos(1/x)]^(x²)
=e^lim(x—>∞)x²[cos(1/x)-1]
=e^lim(x—>∞)x²[(1/x)²/2]
=1/2 .
=(arctan1+π/4)/√(1²+ln1)
=(π/4+π/4)/√(1+0)
=π/2 ;
② lim(x—>∞)[cos(1/x)]^(x²)
=e^lim(x—>∞)x²[cos(1/x)-1]
=e^lim(x—>∞)x²[(1/x)²/2]
=1/2 .
已赞过
已踩过<
评论
收起
你对这个回答的评价是?
推荐律师服务:
若未解决您的问题,请您详细描述您的问题,通过百度律临进行免费专业咨询