3- Integration Bounds - The Definite Integral
So, integration obviously can be done for a specific interval.
Think of it like this: We dont want the entire area of the graph so we cut the graph and find that area.
We'll have to make a cut at one point and another one at the end. These are precisely the bounds:
The lower bound of the integral is the "starting point" for the "cut".
The upper bound of the integral is the "sending point" for the "cut".
We place the lower bound on the lower side of the integral symbol, and the upper bound on the upper side of the integral symbol. Easy, right?