I know how to calculate Riemann sums however whenever there is a square root involved with the sigma notation, I am completely stuck (with any problem that has a square root).
What I did get, however, is that b = 5 and that the function f(x) is f(x) = sqrt(25 - x^2). The question is #2 on the "temp.pdf" file. My (limited) work is attached on the "mywork.pdf" file.
Any help would be GREATLY appreciated!
Thanks in advance!
I don't know how to replace dx. My teacher didn't teach that yet. In fact, he said not to worry about it for now. Also if this is a "substitution rule," I noticed in my book that that is the next topic therefore I did not cover it so I am not understanding you guys. But, if I have to know something I didn't learn yet to do this properly then I was probably expected to use the "half circle's area" method.