can the prime really not solve this integral?
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02-27-2014, 12:21 PM
Post: #9
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RE: can the prime really not solve this integral?
You get a numeric answer with:
int(x^3/(exp(x)-1),x,0,inf) then shift-enter. x^3/(exp(x)-1) does not have an antiderivative than you can express with elementary function (special functions required, polylogs here). There is probably a trick than can give you the exact answer (pi^4/15) for the definite integral, any idea? On a voyage 200, you don't get the exact value by the way. |
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