
Re: Integrate with unknow function
Posted:
Mar 24, 2013 4:16 AM


Either I'm not understanding something here or you didn't explain the situation precisely. . .
Is f just a symbol, or is there already an actual definition in the form f[d_] := (some expression in d) ?
In any case, when you integrate with respect to d, that's a "dummy variable", so you would never expect to get an answer with a d in it.
At the very best, you might hope that the difference reduces to Integrate[f[d], {d, 2, 3}], for a specific function f.
Incidentally, d is probably a very bad name for the variable of integration!
On Mar 23, 2013, at 3:25 AM, Shan <shan.pub@gmail.com> wrote:
> Hi, > > I have a very rookie question as follows: > > Integrate[f[d], {d, 0,3}]  Integrate[f[d], {d, 0,2}] > > How can I get the result as f[d]? Thanks very much for any help! > > shan
 Murray Eisenberg murray@math.umass.edu Mathematics & Statistics Dept. Lederle Graduate Research Tower phone 413 5491020 (H) University of Massachusetts 413 5452838 (W) 710 North Pleasant Street fax 413 5451801 Amherst, MA 010039305

