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religanth

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exp(-ax^2)ÔõÑùÔÚ£¨m,n£©Çø¼ä½øÐж¨»ý·Ö£¿a£¬m£¬nΪ³£Êý£¬Ïêϸ²½Öèлл£¡£¡

[ Last edited by ÓàÔó³É on 2010-8-28 at 12:15 ]
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snoopyzhao

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¡ï
ÓàÔó³É(½ð±Ò+1):лл²ÎÓëÓ¦Öú£¡ 2010-08-28 10:18:47
religanth(½ð±Ò+2): 2010-08-28 11:17:38
ÒýÓûØÌû:
Originally posted by mshwangg at 2010-08-27 23:49:14:

ºÍmathematicaµÄ½á¹ûÂÔÓв»Í¬°¡

ÆäʵһÑùµÄ°¡£¬sqrt(log(%e)) = 1 °¡¡­¡­
6Â¥2010-08-28 07:53:58
ÒÑÔÄ   »Ø¸´´ËÂ¥   ¹Ø×¢TA ¸øTA·¢ÏûÏ¢ ËÍTAºì»¨ TAµÄ»ØÌû
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minggx

Í­³æ (СÓÐÃûÆø)

religanth(½ð±Ò+5):Õâ¸öÄÜÓÃÊýѧ¹«Ê½ÐÎʽ³ÂÁгöÀ´Â𣿠лл£¡ 2010-08-27 17:17:36
ÔÚÎÒÕâÑùµÄ¸ßÊýä¿´À´¡£¡£¡£Õâ¸öûÓбØÒªÊǸßÊýר¼Ò°É£¿

Clear[a, x, m, n];
Integrate[Exp[-a x^2], {x, m, n}]
Domorethannecessary.
2Â¥2010-08-27 17:06:15
ÒÑÔÄ   »Ø¸´´ËÂ¥   ¹Ø×¢TA ¸øTA·¢ÏûÏ¢ ËÍTAºì»¨ TAµÄ»ØÌû

religanth

½ð³æ (ÕýʽдÊÖ)

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3Â¥2010-08-27 17:11:37
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snoopyzhao

ÖÁ×ðľ³æ (Ö°Òµ×÷¼Ò)

¡ï
ÓàÔó³É(½ð±Ò+1):лл²ÎÓëÓ¦Öú£¡ 2010-08-27 23:01:33
religanth(½ð±Ò+2): 2010-08-28 11:16:53
maxima ¸ø³öµÄ½á¹ûÊÇ£º

(%i3) integrate(exp(-a*x^2),x,m,n);

(%o3) sqrt(%pi)*erf(sqrt(a)*n)/(2*sqrt(a))
       -sqrt(%pi)*erf(sqrt(a)*m)/(2*sqrt(a))

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