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2 articles trouvés pour ce sujet.
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4 + 10 + · · · + (6n − 2) |
2010-04-21 |
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Lan pose la question :
Find the sum 4 + 10 + · · · + (6n − 2). The answer is 3(n^2) + n. How?
Penny Nom lui répond. |
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Arithmetic Sums |
2006-04-12 |
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Angel pose la question :
(a) In a particular arithmetic sequence, u6 = 344.5 and u20 = 88.3. Find S28.
(b) In a particular arithmetic series, S10 = 495 and S15 = 1005. Express S15 in sigma notation.
Stephen La Rocque lui répond. |
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