Setup the limit definition of definite integrals?

So you just need to set up the limit definition.

You would need to use the formula 


Where  and .

Basically we would have approximate area with rectangles with width and height , and we have the value of n approaches to infinity.

Now, from the definite integral, we have .

So then that would be


So this is how you set up the limit definition of definite integrals.

Hope this helps.