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3 years ago

8

PLEASE HELP!!!

1 answer:

Svet_ta [14]3 years ago

5 0

The first one is the best answer. Eight terms, common difference 4, first term 3, check.

Plenty of people (including me) write the second one as equivalent, but without the parentheses it's not clear if that final 1 is being summed or outside the summation so it's best fully parenthesized.

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