The Math Forum

Search All of the Math Forum:

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

Math Forum » Discussions » Math Topics » discretemath

Topic: creative arithmetic - - discrete math
Replies: 7   Last Post: Nov 23, 2010 8:13 PM

Advanced Search

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

Posts: 2
Registered: 11/17/10
creative arithmetic - - discrete math
Posted: Nov 17, 2010 9:47 AM
  Click to see the message monospaced in plain text Plain Text   Click to reply to this topic Reply

1+2+3+...+(4^2- 1^2- 3) / 2 , the left hand side of this equation is a telescoping sum, namely every time we add a term of the same for part of the new term cancels out part of the existing sum.

1. find the corresponding sum if we add up the first N non-negative integers. this should simplify our formula.
2. adapt this method to find the sum of the squares of the first N -non-negative integers. to obtain the telescoping component, use (m+1)^3 -m^3=3m^2+3m+1
3. this method can be adapted to find the sum of the Kth powers of the first N non-negative integers and the sum of the fourth powers of the first N non-negative integers.

4. find a formula for the sum of the 10th powers of the first N non-negative integers that involves a close form featuring an algebraic combination including N.

help would be appreciated, please number the responses!!

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

[Privacy Policy] [Terms of Use]

© The Math Forum at NCTM 1994-2017. All Rights Reserved.