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Find S15 for the series -1 + -3 + -5 + -7 +...
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4 votes
Find S15 for the series -1 + -3 + -5 + -7 +...

User Jukka Puranen
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1 Answer

2 votes

The given series is
-1 + -3 + -5 + -7 +...

Alternatively it can be written as , say s then


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User Gabbar
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