Drexel dragonThe Math ForumDonate to the Math Forum



Search All of the Math Forum:

Views expressed in these public forums are not endorsed by Drexel University or The Math Forum.


Math Forum » Discussions » Math Topics » discretemath

Topic: how to derive a formula to find the sum of a sequence?
Replies: 4   Last Post: Nov 3, 2012 3:56 PM

Advanced Search

Back to Topic List Back to Topic List Jump to Tree View Jump to Tree View   Messages: [ Previous | Next ]
Ben Brink

Posts: 197
From: Rosenberg, TX
Registered: 11/11/06
RE: how to derive a formula to find the sum of a sequence?
Posted: Nov 2, 2010 7:30 PM
  Click to see the message monospaced in plain text Plain Text   Click to reply to this topic Reply
att1.html (1.2 K)


Imno,
How many 6's are we adding here? And how many times have we found the sum from k = 1 to k = 5? Does that give you an idea for finding the sum from k = 1 to k = n? Thanks for a great problem!
Ben

> Date: Tue, 2 Nov 2010 19:10:13 -0400
> From: discussions@mathforum.org
> To: discretemath@mathforum.org
> Subject: how to derive a formula to find the sum of a sequence?
>
> So, let's say I have a question like
> 5
> SUM (k+1)
> k=1
>
> 5 being the upper limit
> k being lower limit
> k+1 being the sequence
>
> How would I find a formula to get the answer, without actually adding every k+1 ect
>
> The teacher told us to do something like this for the first step:
> 1 2 3 4 5
> 5 4 3 2 1
> sum of the top and bottom = 6.. From there I'm lost
>
> Can anyone help?
>
> Thanks





Point your RSS reader here for a feed of the latest messages in this topic.

[Privacy Policy] [Terms of Use]

© Drexel University 1994-2014. All Rights Reserved.
The Math Forum is a research and educational enterprise of the Drexel University School of Education.