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Re: Some assistance from seasoned users.

  • To: mathgroup at smc.vnet.net
  • Subject: [mg124910] Re: Some assistance from seasoned users.
  • From: David Reiss <dbreiss at gmail.com>
  • Date: Sun, 12 Feb 2012 04:59:15 -0500 (EST)
  • Delivered-to: l-mathgroup@mail-archive0.wolfram.com
  • References: <jh6k2n$jr9$1@smc.vnet.net>

Th
Mathematica can do these integrals just fine.  But you need to use the
correct syntax for the expressions.

Here they are


Sin[x]^3/x

and

Sin[x]^3/x^3

Using a construct like sin^3[x]  hast two problems.  The "s" must be
capitalized and the Sin[x] must be raised to the 3rd power not the
Sin.

Hope this helps.

--David

On Feb 11, 3:46 pm, "peter livingston" <peter.livings... at cox.net>
wrote:
> Folks!
>
> I have recently come to the pleasures of Mathematica from other popular but
> very expensive programming methods that I, as a retiree, cannot afford.
>
> My specific question is this: why am I able to get Mathematica to do the
> complete integral of sin(x)/x, but it refuses to do any of the other type s:
> specifically sin^3[x]/x or sin^3[x]/x^3 over the half interval from zero to
> infinity. (see page 449 of G & R  Table of Integrals).
>
> It seems to suggest that throwing away my Gradshtein and Ryzhik is premature
> in spite of the claims in the Mathematica "Mathematics and Algorithms"
> manual.
>
> Peter Livingston




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