Express this in sigma notation?(adsbygoogle = window.adsbygoogle || []).push({});

3^3 - 3^4 + 3^5 - ... - 3^100

Evaluate these two sigmas?

n

∑ (i-2)^2

i =1

n

∑ (4-i^2)

i =1

I don't really understand sigma notation so I'm really interested in the process and explanation of how to do it. Any help would be greatly appreciated!

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# Sigma Notation Help?

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