Q: Collect, Coefficient, and non-integer exponents

• To: mathgroup at smc.vnet.net
• Subject: [mg8733] Q: Collect, Coefficient, and non-integer exponents
• From: sergio at scisun.sci.ccny.cuny.edu (Sergio Rojas)
• Date: Sat, 20 Sep 1997 22:28:01 -0400
• Organization: City College Of New York - Science
• Sender: owner-wri-mathgroup at wolfram.com

```(**
Hi folks,

Assume that for fun one want to deal with an expression containing
non-integer powers of a certain variable x. Take as an illustration
the following expression;
******)
expr = Expand[Sum[(a*n +b*n -c)*x^(n+0.12/n),{n,1,4}]];

(**
One knows in advance that a power of x is, for example, 1.12 and
we want to know its coefficient. Apparently Coefficient and Collect
work only with integers. Is there a way to deal with this situation?

Salut,

Rojas
E-mail: sergio at scisun.sci.ccny.cuny.edu

PS.
I am using Mathematica:
In[37]:= \$Version
Out[37]= DEC OSF/1 Alpha 2.2 (September 9, 1994)

******)

```

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