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Re: [微積] 一題積分 int(x^2*exp(-a*x^2),-inf,inf)

[ Math ]7 留言, 推噓總分: +3

作者: MathforPhy - 發表於 2012/10/15 23:23(13年前)

5^F→profyang:其實這有個更快的做法直接對a微分10/15 23:41

6^F→profyang:我在幹嘛= =這篇就是那個做法了= =我以為這篇是分部10/15 23:42

7^F→profyang:積分的做法10/15 23:42

[微積] 一題積分 int(x^2*exp(-a*x^2),-inf,inf)

[ Math ]16 留言, 推噓總分: +5

作者: Ycosmos - 發表於 2012/10/15 22:53(13年前)

1^F→profyang:部分積分10/15 22:54

[其他] office2010鑲入mathtype的問題

[ Math ]5 留言, 推噓總分: +4

作者: stu2005131 - 發表於 2012/09/16 14:25(13年前)

2^F推profyang:新版本的mathtype記得就直接出現在toolbox了09/16 15:36

4^F推profyang:樓上何不實際試過再來嗆?我現在用mathtype都沒問題09/17 00:33

[微積] 微積分考試，用初等數學方法去解會被扣分嗎？

[ Math ]49 留言, 推噓總分: +17

作者: newversion - 發表於 2012/08/19 15:47(13年前)

5^F推profyang:題目沒要求你用什麼做法就不能扣阿~08/19 17:59

Re: [微積] f(x+y)=f(x)f(y)

[ Math ]10 留言, 推噓總分: +4

作者: PaulErdos - 發表於 2012/07/08 12:44(13年前)

8^F推profyang:Lpspace大能否PO個f(x)＝e^kx的證明阿@@不須可微的07/10 07:13

9^F→profyang:有點好奇說~07/10 07:14

[中學] 證明 1^2+2^2+...+n^2=n(n+1)(2n+1)/6

[ Math ]5 留言, 推噓總分: +3

作者: SmallLuLu - 發表於 2012/05/21 05:47(13年前)

1^F推profyang:就是你寫的阿你把他對x寫出來發現三次方可以消掉05/21 07:03

2^F→profyang:同理三次方和也可以用四次方消掉這樣來處理05/21 07:04

[微積] 一題積分

[ Math ]3 留言, 推噓總分: +2

作者: xru04dk4 - 發表於 2012/04/25 15:17(13年前)

2^F推profyang:嚴謹的證明要將cos作泰勒展開然後分項積分再加起來04/25 21:22

3^F→profyang:你會積x^(2n)*e^(-a*x^2)吧~那就沒問題了04/25 21:23

[微積] 積出磁場 (純數學無關物理)

[ Math ]2 留言, 推噓總分: +2

作者: Alcor - 發表於 2012/04/24 11:17(13年前)

1^F推profyang:三角代換?04/24 11:39

[中學] 國中補習班老師下的戰帖

[ Math ]9 留言, 推噓總分: +4

作者: volume0726 - 發表於 2012/04/20 09:46(14年前)

1^F推profyang:不就是半圓的面積嗎...?04/20 10:25

[代數] 請問有什麼軟體可以解n次方程式

[ Math ]18 留言, 推噓總分: +6

作者: joycers - 發表於 2012/04/17 16:39(14年前)

8^F推profyang:咩lab04/17 19:43

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