# Derivative of Summation

## Main Question or Discussion Point

Hey,

I have a general question about summations. Is there any steadfast rule for calculating, or obtaining a sometimes-calculatable function for, the derivative of x, where x is the upper bound of summation in a simple summation expression (the summation of f(n), from n = 1 to x)?

If not, is there a general procedure that can be followed to obtain solutions to such problems?

Thanks,
-Trepidation