Yahoo Answers is shutting down on May 4th, 2021 (Eastern Time) and beginning April 20th, 2021 (Eastern Time) the Yahoo Answers website will be in read-only mode. There will be no changes to other Yahoo properties or services, or your Yahoo account. You can find more information about the Yahoo Answers shutdown and how to download your data on this help page.
Trending News
Promoted
Please can you all help me out by telling me when should I use the An and sn formula in AP(arithmetic progression) during word problems.?
1 Answer
Relevance
- Anonymous6 years ago
a(sub n) represents: the n-th term of a sequence.
S(sub n) represents: the Sum of n terms of a series.
an = a1 + (n - 1)d
Sn = (n/2)(a1 + an) or (n/2)[2a1 + (n - 1)d]
here is a link to help you:
Still have questions? Get your answers by asking now.