You will be able to evaluate a definite integral by writing it as a limit of a Riemann sum
Before we formally define the definite integral, we have to understand the norm, which is basically the barfly of the subintervals used as the width of our rectangles. Duration: 7:12
Now that we have the definition of a definite integral down, let's evaluate one on Example 2 by, of course, rewriting it as a limit of a Riemann sum. Duration: 8:51
We know how do identify a differentiable function, but how do we identify an integrable function? It's certainly easier than you think. Also, let's get some worry-free practice at writing the limit of a Riemann sum as a definite integral, as I have it on good authority that's what you'll have to do on the AP Exam. Duration: 12:46