My Math Forum  

Go Back   My Math Forum > College Math Forum > Number Theory

Number Theory Number Theory Math Forum


Reply
 
LinkBack Thread Tools Display Modes
January 13th, 2010, 08:25 AM   #1
Member
 
Joined: Jul 2009

Posts: 88
Thanks: 0

natural numbers !

Find all such that
rose3 is offline  
 
January 13th, 2010, 08:41 AM   #2
Global Moderator
 
CRGreathouse's Avatar
 
Joined: Nov 2006
From: UTC -5

Posts: 16,046
Thanks: 938

Math Focus: Number theory, computational mathematics, combinatorics, FOM, symbolic logic, TCS, algorithms
Re: natural numbers !

Factorials are positive, so if t > 2 then
t! > m! + n! for m,n < t
and
t! < m! + n! for m >= t or n >= t

So all you need to do is check t <= 2.
CRGreathouse is offline  
Reply

  My Math Forum > College Math Forum > Number Theory

Tags
natural, numbers



Thread Tools
Display Modes


Similar Threads
Thread Thread Starter Forum Replies Last Post
Natural numbers yo79 Math Events 2 April 7th, 2013 02:11 AM
Natural numbers EulerRules Number Theory 9 March 5th, 2013 09:39 AM
The paradox between prime numbers and natural numbers. Eureka Number Theory 4 November 3rd, 2012 03:51 AM
Proof of m > n in the Natural Numbers jstarks4444 Number Theory 4 February 18th, 2011 05:22 PM
natural numbers from sets....not very natural jinjouk Number Theory 12 June 3rd, 2008 06:11 AM





Copyright © 2018 My Math Forum. All rights reserved.