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)

Comments: ( Back to comment list | You must be logged in to post comments.)

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

Please log in:

Forums (1)
Newest Problems
Random Problem
FAQ | About This Site
Site Statistics
New Comments (6)
Unsolved Problems
Top Rated Problems
This month's top
Most Commented On

Chatterbox:


perplexus dot info