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Re: Some assistance from seasoned users.

  • To: mathgroup at smc.vnet.net
  • Subject: [mg124916] Re: Some assistance from seasoned users.
  • From: Bill Rowe <readnews at sbcglobal.net>
  • Date: Sun, 12 Feb 2012 05:01:21 -0500 (EST)
  • Delivered-to: l-mathgroup@mail-archive0.wolfram.com

On 2/11/12 at 6:35 AM, peter.livingston at cox.net (peter livingston)
wrote:


>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 types: specifically sin^3[x]/x or sin^3[x]/x^3 over the half
>interval from zero to infinity.

You didn't state what you tried or what version of Mathematica
you are using. I have no problem with either of the above
integrals. That is:

In[2]:= Integrate[Sin[x]^3/x, {x, 0, Infinity}]

Out[2]= \[Pi]/4

In[3]:= Integrate[Sin[x]^3/x^3, {x, 0, Infinity}]

Out[3]= (3 \[Pi])/8

In[4]:= $Version

Out[4]= 8.0 for Mac OS X x86 (64-bit) (October 5, 2011)




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