(adsbygoogle = window.adsbygoogle || []).push({}); Improper integral and "rectangle" method

If we have a definite integral then..using "rectangle" method we can get the approximation:

[tex] \int_{a}^{b}f(x)dx \sim \sum_{n=0}^{N}f(a+nh)h [/tex]

My question is..how do you define this method when b-->oo (Imporper integral?)...

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# Improper integral and rectangle method

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