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3Â¥: Originally posted by heminpest at 2015-11-30 16:10:13
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heminpest: ½ð±Ò+2, ¡ïÓаïÖú 2015-11-30 21:26:37
heminpest(feixiaolin´ú·¢): ½ð±Ò+2 2015-12-01 22:35:16
>> syms x y
>> int(int(x^2*exp(x^2+y^2)*int(x^2+y^2,y,0,1)/3,x,0,1),y,0,1)

ans =

1/72*i*exp(1)*pi^(1/2)*erf(i)-7/144*pi*erf(i)^2

>> double(ans)

ans =

    0.3055
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