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Σ20/n=1(3n+2) = what
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Σ20/n=1(3n+2) = what

Σ20/n=1(3n+2) = what-example-1
User Hlscalon
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1 Answer

4 votes
The answer is 670.

This is because n increases by one each times until it hits twenty, starting at one.
User Epocolis
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