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aleksandr82 [10.1K]
3 years ago
9

Evaluate: sigma 20 and 1 = (3n+2)HEEELLLPPP MEEEEE

Mathematics
1 answer:
nadezda [96]3 years ago
5 0

Answer:

Step-by-step explanation:

\displaystyle \sum_{n=1}^{20} (3n+2)=\dfrac{(62+5)*20}{2} =10*67=670\\

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