Thank you! On Friday, November 8, 2013 7:48:22 PM UTC-6, Erin Hodgess wrote: > > Hello! > > I would like to use a letter as a constant in integration/differentiation > problems but I am having some trouble. > > For instance, I would like to have > exp(t*x) > > But when I do that, I get "t is not defined". > > This is in Python 2.7.5 > > Thanks for any help! > > Sincerely, > Erin > >
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