作者besten (永远)
看板trans_math
标题[积分]
时间Tue Apr 24 18:33:58 2007
1+x'
∫-------------- dx
1+x^2
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※ 发信站: 批踢踢实业坊(ptt.cc)
◆ From: 61.230.187.189
1F:推 LuisSantos:请问你题目有打对吗 140.119.27.58 04/24 18:35
2F:推 besten:答案是 arctan(x)吗? 61.230.187.189 04/24 19:04
3F:→ goshfju:1+x' 吗?140.136.161.123 04/24 20:13