作者nightseven (竹楓)
看板trans_math
標題[積分] 指數積分
時間Tue Sep 27 21:06:08 2011
e^t
∫------------------------ dt
[e^(2t) + 1]^(1.5)
代換好多次，都一直錯。好挫折...
拜託各位大大了!!!!!!
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◆ From: 125.230.64.49
1F：推 znmkhxrw:let e^t = x , let x = tany 1.169.132.113 09/27 21:33
2F：→ znmkhxrw:ans = siny = x/(x^2+1)^0.5 1.169.132.113 09/27 21:33
3F：→ znmkhxrw:= e^t / (e^(2t)+1)^0.5 1.169.132.113 09/27 21:34
4F：→ nightseven:太感謝了!!!!!(泣) 125.230.64.49 09/27 21:43