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Kisachek [45]
3 years ago
8

Still pretty confused on this.

Mathematics
1 answer:
aleksandrvk [35]3 years ago
7 0
\displaystyle \sum_{i=3}^7(3i-1)=3\cdot3-1+3\cdot4-1+3\cdot5-1+\\\\ +3\cdot6-1+3\cdot7-1=8+11+14+17+20=70
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Answer:

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Step-by-step explanation:

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3 years ago
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mestny [16]

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