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求助 一个非常复杂的积分

upchjf 发布于 2006-07-10 15:57, 915 次点击
y =-88814529018675082773239/281474976710656*exp(-762910995089705008946046272640625/4835703278458516698824704/(x-16/25)^2*(2184786251229975/1152921504606846976/(x-8/25)^3-5116589636859603/18889465931478580854784/(x-8/25)^9-2507/50000)^2)/(x-16/25)*(2184786251229975/1152921504606846976/(x-8/25)^3-5116589636859603/18889465931478580854784/(x-8/25)^9-2507/50000)*(1/(x-16/25)^2*(2184786251229975/1152921504606846976/(x-8/25)^3-5116589636859603/18889465931478580854784/(x-8/25)^9-2507/50000)-5524168697966075/137438953472/(x-16/25)*(6554358753689925/1152921504606846976/(x-8/25)^4-5756163341467053/2361183241434822606848/(x-8/25)^10))

x 在0~2积
7 回复
#2
upchjf2006-07-10 21:51
#3
abingchem2006-07-11 00:46

用maple算的,不过结果是零。。。。。。仅供参考
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#4
upchjf2006-07-11 15:40
thanks 结果好像是 10^-100 左右
#5
upchjf2006-07-11 15:56

源程序发给我好吗 upchjf@yahoo.com.cn

#6
abingchem2006-07-11 23:51

这个是用maple做的,代码如下:
f:=x->-88814529018675082773239/281474976710656*exp(-762910995089705008946046272640625/4835703278458516698824704/(x-16/25)^2*(2184786251229975/1152921504606846976/(x-8/25)^3-5116589636859603/18889465931478580854784/(x-8/25)^9-2507/50000)^2)/(x-16/25)*(2184786251229975/1152921504606846976/(x-8/25)^3-5116589636859603/18889465931478580854784/(x-8/25)^9-2507/50000)*(1/(x-16/25)^2*(2184786251229975/1152921504606846976/(x-8/25)^3-5116589636859603/18889465931478580854784/(x-8/25)^9-2507/50000)-5524168697966075/137438953472/(x-16/25)*(6554358753689925/1152921504606846976/(x-8/25)^4-5756163341467053/2361183241434822606848/(x-8/25)^10))
int(f(x),x=0..2) //对函数进行积分,结果是个表达式,
evalf(%)                //将表达式转换成数值形式

#7
abingchem2006-07-11 23:59
Matlab可以调用Maple函数的,具体调用还没有仔细研究过
#8
upchjf2006-07-12 06:16
十分感谢 是值域的问题,已解决
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