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Homework Statement
I was wondering how one integrates on a open interval. For example let's say I wanted to integrate the function f(x) = x^2 + 2x + 3 on (2,7). Note that it's on the OPEN INTERVAL not closed of all the x values from 2 to 7 not including 2 to 7. I'm not trying to integrate on [2,7] but on (2,7). How do I do this? Thanks. Any ideas or suggestions or anything at all would be appreciated.