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I am looking at a solution to an question and I don't understand how the value of the following definite integral comes out to be zero ? The following function is evaluated from 0 to ∞ with r being the variable

## exp(-β^2r^2)r^nr^-1/(n-1)## That should read r raised to the power of (n-1)

I presume when the value of ∞ is input the negative exponential turns out to be zero but I don't understand how inputting zero gives a value of zero ?

## exp(-β^2r^2)r^nr^-1/(n-1)## That should read r raised to the power of (n-1)

I presume when the value of ∞ is input the negative exponential turns out to be zero but I don't understand how inputting zero gives a value of zero ?

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