Proving Every Int. ≥ 12 Is a Combination of 4m + 5n

  • Thread starter Thread starter hocuspocus102
  • Start date Start date
  • Tags Tags
    Combination
Click For Summary
SUMMARY

The discussion focuses on proving that every integer greater than or equal to 12 can be expressed as a linear combination of the form 4m + 5n, where m and n are non-negative integers. The initial step involves establishing the base case, specifically demonstrating that 12 can be represented as 4(3) + 5(0). The hint provided suggests utilizing the equation 1 = 5 - 4 to facilitate the induction process, allowing for the construction of subsequent integers by adding combinations of 4 and 5.

PREREQUISITES
  • Understanding of mathematical induction
  • Familiarity with linear combinations
  • Knowledge of non-negative integers
  • Basic algebraic manipulation skills
NEXT STEPS
  • Study the principles of mathematical induction in depth
  • Explore linear combinations and their applications in number theory
  • Investigate the Frobenius coin problem for further insights
  • Practice problems involving combinations of integers
USEFUL FOR

Students studying number theory, mathematics educators, and anyone interested in combinatorial proofs and mathematical induction techniques.

hocuspocus102
Messages
44
Reaction score
0

Homework Statement



Prove that every integer greater than or equal to 12 can be written as a combination of 4m+5n where m and n are non-negative integers.


Homework Equations





The Attempt at a Solution



I know I have to use induction but I don't really know how to go about doing it past showing that it works for the base case of n=12 where then a=3 and b=0.
 
Physics news on Phys.org
Hint: 1 = 5 - 4
 

Similar threads

  • · Replies 10 ·
Replies
10
Views
4K
  • · Replies 12 ·
Replies
12
Views
4K
  • · Replies 5 ·
Replies
5
Views
2K
Replies
6
Views
2K
  • · Replies 4 ·
Replies
4
Views
2K
  • · Replies 6 ·
Replies
6
Views
2K
  • · Replies 6 ·
Replies
6
Views
9K
  • · Replies 11 ·
Replies
11
Views
4K
Replies
9
Views
2K
  • · Replies 2 ·
Replies
2
Views
2K