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On 09/18/2011 11:43 PM, wrote:
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<p>Dr. Pounds, </p>
<p> </p>
<p>I am stuck on problem 30 from the book. I am having trouble
integrating <x^2>. I have attached what I have started
in mathmatica. Can you help point me in the right direction?
</p>
<p> </p>
<p>Thanks, </p>
<p><br>
</p>
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</blockquote>
First -- remember that this in an even function times and even
function -- which will result in an even function being integrated.
In the case of integrating an even function one normally changes the
limits of integration to [0,Infinity] and multiplies the result by
two. You can then use the definite integrals from page 887 of your
textbook or from the more complete set in your Steiner text.
Altenatively you can ask Mathematica to do it<br>
<br>
Something like this might work better that what you have asked
Mathematica to do...<br>
<br>
Integrate[ x^4 * Exp[- \[Alpha] x^2], {x, 0, Infinity}]<br>
<br>
<br>
<br>
<pre class="moz-signature" cols="72">--
Andrew J. Pounds, Ph.D. (<a class="moz-txt-link-abbreviated" href="mailto:pounds@theochem.mercer.edu">pounds@theochem.mercer.edu</a>)
Associate Professor of Chemistry and Computer Science
Mercer University, Macon, GA 31207 (478) 301-5627
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