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**LumusRedfoot** Ok look, I know limit integration but can someone explain how Riemann integration is any different. Because I can't figure out the difference based on what I've been told. This isn't a specific problem to solve, I just want to know what it is. They seem the same to me. But what is this about seperating the limits into blocks. Why do you have to do that? Why don't you just use the normal limit integration? Is it when you don't know the equation of the curve? Also what do you do once you have the maximum and minimum? Do you just leave the area as a range? I am confused.