Re: [考古] 86清大理工
x^2 +1 x^2+1 x^2 x^2+1
S _____ dx = S______ ____ ____ dx
x^4 +1 x^4 +1 x^2+1 x^2
x^2
S _____ d(x-1/x)
x^2+1
1
S_____ d(x - 1/x)
1 + 1/x^2
1
S______ d(x-1/x)
(x-1/x)^2 +2
1
S______ d(u) =(u/2) arctan(u/2) + C
u^2 +2
--
※ 發信站: 批踢踢實業坊(ptt.cc)
◆ From: 125.229.192.242
推
07/09 08:48, , 1F
07/09 08:48, 1F
討論串 (同標題文章)