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math2000

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soliton923: ½ð±Ò+2, лл²ÎÓëÌÖÂÛ~~~ 2012-03-30 23:01:41
ÈýÇØ´ó³æ: ½ð±Ò+2, ¡ïÓаïÖú, ¸ÐлӦÖú 2012-06-01 16:14:33
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2Â¥2012-03-30 20:54:50
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wjlwyk

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ÈýÇØ´ó³æ: ½ð±Ò+2, ¡ïÓаïÖú, ¸ÐлӦÖú 2012-06-01 16:15:05
syms x y  lamda positive
int(lamda^2*exp(-lamda*x)*exp(-lamda*(y-x)),x,0,y)
ans =

y*lamda^2*exp(-lamda*y)
3Â¥2012-04-01 11:13:20
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wjlwyk

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I am sorry, I am too careless, The result can not be given explicitly in a concrete form. Just like the indefinite integral  of sin(x)/x can not be expressed by elementary functions.
4Â¥2012-04-01 11:45:11
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wangybcn

½û³æ (ÕýʽдÊÖ)

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ÈýÇØ´ó³æ: ½ð±Ò+2, ¡ïÓаïÖú, ¸ÐлӦÖú 2012-06-01 16:13:43
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5Â¥2012-06-01 11:16:50
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yizhousan

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