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$\Sigma_{i_=n+1}^n$ I think the result will be 0 right ?

My reasoning being since this would be a summation of an empty sequence.

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    $\begingroup$ It's usually defined to be 0, but you can define it however you see fit. $\endgroup$
    – Dzoooks
    Nov 19, 2019 at 3:10
  • $\begingroup$ @Dzoooks how do you mean? could you give an example ? $\endgroup$
    – KetDog
    Nov 19, 2019 at 3:12
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    $\begingroup$ Remember that if we interchange the endpoints on a definite integral, we negate the value. So, be careful, context matters. $\endgroup$
    – Will Jagy
    Nov 19, 2019 at 3:14

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