(adsbygoogle = window.adsbygoogle || []).push({}); 1. The problem statement, all variables and given/known data

[tex]\int^{\infty}_{0} e^{-y} dy = 1[/tex]

2. Relevant equations

3. The attempt at a solution

Why is this equality true? I understand that the integral and derivative of e^y is always e^y, but I can't make out why this definite integral is equal to 1. I graphed it using a graphing application and can see why it converges to a finite number, but I can't work it out step by step.

Thanks, I appreciate your help.

M

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# Homework Help: Definite Integral: Exponential

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