Ok I know that the [tex]\int e^x = e^x + C[/tex](adsbygoogle = window.adsbygoogle || []).push({});

now I dont understand this problem.

[tex]\int_0^1 e^{-3x} dx = -(1/3)e^{-3(0)} - -(1/3)e^{-3(1)}[/tex]

[tex]= 1/3(1- e^{-3} )[/tex]

Where does the 1/3 come from?

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# Need help w/ an integral

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