Small integration

  • #1
Hello.I actually didn't know exactly how do we get to the second line with this integration.
 

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  • #2
Defennder
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Integrate this by splitting up the interval on which it is done:

[tex]\int^L_{-L} f(t) dt = \int^L_{0} f(t) dt + \int^0_{-L} f(-t) dt [/tex]

Then you'll be able to remove the '| |' and integrate it normally. When you're done with the integration, just substitute in the limits and let L approach infinity.
 

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