Here is the problem I'm working on:
Estimate the area under the graph of f(x)=4x^3+6 from x=−1 to x=3, first using 4 approximating rectangles and right endpoints, and then improving your estimate using 8 approximating rectangles and right endpoints. 4 Rectangles = 168 8 Rectangles = (B) Repeat part (A) using left endpoints. 4 Rectangles = 56 8 Rectangles = (C) Repeat part (A) using midpoints. 4 Rectangles = 100 8 Rectangles =
Now I got the three values in there already correct, but the other three I can't figure out what to do. This is how I worked it:
Ive spent at least an hour on this one problem. Thanks!