作者mathqaz (成)
看板trans_math
标题Re: [极限]极限两题请问
时间Wed Nov 8 20:10:18 2006
lim [(x^2 +1)/(x^2 -1)]^(x^2)
x->∞
=lim [(1+2/(x^2 -1)]^(x^2)
x->∞
=lim [(1+2/(x^2 -1)^(x^2 -1/2)]^(2/x^2 -1)(x^2)
x->∞
= lim (2x^2)/(x^2-1)
e^x->∞
=e^2
呼，打的有点乱，我这样算应该没错，答案应该有问题吧！？
第二提就麻烦高手了，我不会算orz
--
※ 发信站: 批踢踢实业坊(ptt.cc)
◆ From: 218.168.103.243