perplexus.info :: Just Math : The sum of a sequence

The sum of a sequence (Posted on 2004-12-14)

Find the sum of the sequence: x, 2x², 3x³, 4x⁴, 5x⁵, ... , nxⁿ.

See The Solution Submitted by Mohammad

Rating: 3.4286 (7 votes)

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all the solutions need...

| Comment 5 of 10 |

the caveat that when x=1, instead of the given formula, you need to use

n(n+1)/2

as the general formula leads to a division by zero.

Posted by Charlie on 2004-12-14 18:35:20

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