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find the sum of the series to n terms n.1+(n-1).2 + (n-2).3 + (n-3).4+..........

Subhasis Ghorai

Aug. 6, 2017, 8:04 a.m.

Answers!

Subhasis Ghorai

Aug. 6, 2017, 8:09 a.m.

IS the answer 1/6[n(n+1)(n+2) correct?

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