# Thread: Using definition of the integral

1. ## Using definition of the integral

I have to evaluate this integral using the definition of the integral. I'm not quite sure how to get started on this. The upper limit is 5, the lower is 1. The integrand is x^2 + 5x + 3. I think I start by making dx = 5-1 and put that over n...other than that I'm kinda lost. Thanks for the help guys!

2. Can you do it frum heir?

3. Thanks dude you always help me out. That didn't look very difficult at all Thanks again for the help bro.