Find a general formula for the temperature in the form of a series with general formula for the coefficients of the series.
with ;
with
How can I resolve ?
Here's another guy from Brazil that posted exactly the same question 2 minutes after you did. He received a (great!) reply.
See Conduction of Heat.
Maybe TPH did it also... "better than the book".
See http://www.mathhelpforum.com/math-he...-equation.html. This thread is worth to be a sticky one I believe.