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The sum of a sequence (Posted on 2004-12-14) Difficulty: 4 of 5
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


as the general formula leads to a division by zero.

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