Take the 2-minute tour ×
Mathematics Stack Exchange is a question and answer site for people studying math at any level and professionals in related fields. It's 100% free, no registration required.

I want to evaluate " sum f(x) g'(x)" the limits of sum goes from 0---> infinity.

I know how to solve this problem using integration by substitution method. I also know that using Riemann sum we can convert summation into integration, but I am still curious whether the Riemann sum can be used to convert summation problem (as given above) into its equivalent integration by substitution ?

Regards, uzma

share|improve this question
    
So you mean $\sum_{x=0}^\infty f(x)g'(x)$ ? I don't think you can simply write that as an integral, though you can test it for convergence using the integral test. –  ljfa Mar 5 at 6:51

Your Answer

 
discard

By posting your answer, you agree to the privacy policy and terms of service.

Browse other questions tagged or ask your own question.