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 » alt.math.recreational.independent

Topic: How do i prove? Please help!!
Replies: 5   Last Post: Mar 17, 2010 4:28 AM

Advanced Search

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

Posts: 406
Registered: 12/4/04
Re: How do i prove? Please help!!
Posted: Jan 16, 2010 11:04 PM
  Click to see the message monospaced in plain text Plain Text   Click to reply to this topic Reply

Any odd integer is either 4n + 1 or 4n + 3. Make a table:

a = 4n + 1, b = 4m + 1, a - b = 4(n - m).
a = 4n + 1, b = 4m + 3, a + b = 4(n + m + 1).
a = 4n + 3, b = 4m + 3, a - b = 4(n - m).
a = 4n + 3, b = 4m + 1, a + b = 4(n + m + 1).

A. Bogomolny
http://www.cut-the-knot.org



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.