Hi, I don't understand this problem at all:(adsbygoogle = window.adsbygoogle || []).push({});

Rewrite the following sum with the index of summation starting at 3 in summation notation:

[tex]\sum_{i=1}^{6}(5+3i)[/tex]

I know that the sum is [tex]93[/tex] but I'm not sure what to do...

Thanks for the help!

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# Rewrite the following sum with the index of summation

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