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I dont understand how you can go from a set of two numbers to a set of 3 numbers 9 ways. I count two identity functions, and four other functions mapping 1->2,1->3, 2->1, 2->3. Where do the 9 fucntions come from, and why are they represented as ordered pairs? What does that even mean, a function is an ordered pair?

arithmetic

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edited Mar 14 at 6:24

Gerry Myerson

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asked Mar 14 at 5:56

TheGusBusTheGusBus

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  Welcome to MSE. It is in your best interest that you type your questions (using MathJax) instead of posting links to pictures.
  $endgroup$
  – José Carlos Santos
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0

$begingroup$

Question

Answer

I dont understand how you can go from a set of two numbers to a set of 3 numbers 9 ways. I count two identity functions, and four other functions mapping 1->2,1->3, 2->1, 2->3. Where do the 9 fucntions come from, and why are they represented as ordered pairs? What does that even mean, a function is an ordered pair?

arithmetic

share|cite|improve this question

edited Mar 14 at 6:24

Gerry Myerson

147k8151303

asked Mar 14 at 5:56

TheGusBusTheGusBus

1

New contributor

TheGusBus is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.

$endgroup$

• 
  
  
  

  
  1
  

  
  
  
  
  
  

  
  $begingroup$
  Welcome to MSE. It is in your best interest that you type your questions (using MathJax) instead of posting links to pictures.
  $endgroup$
  – José Carlos Santos
  Mar 14 at 6:03
  

  
  
  
  

add a comment | 

$begingroup$

Question

Answer

I dont understand how you can go from a set of two numbers to a set of 3 numbers 9 ways. I count two identity functions, and four other functions mapping 1->2,1->3, 2->1, 2->3. Where do the 9 fucntions come from, and why are they represented as ordered pairs? What does that even mean, a function is an ordered pair?

arithmetic

share|cite|improve this question

edited Mar 14 at 6:24

Gerry Myerson

147k8151303

asked Mar 14 at 5:56

TheGusBusTheGusBus

1

New contributor

TheGusBus is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.

$endgroup$

share|cite|improve this question

edited Mar 14 at 6:24

Gerry Myerson

147k8151303

asked Mar 14 at 5:56

TheGusBusTheGusBus

1

New contributor

TheGusBus is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.

share|cite|improve this question

edited Mar 14 at 6:24

Gerry Myerson

147k8151303

asked Mar 14 at 5:56

TheGusBusTheGusBus

1

New contributor

TheGusBus is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.

edited Mar 14 at 6:24

Gerry Myerson

147k8151303

edited Mar 14 at 6:24

Gerry Myerson

147k8151303

asked Mar 14 at 5:56

TheGusBusTheGusBus

1

New contributor

TheGusBus is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.

asked Mar 14 at 5:56

TheGusBusTheGusBus

1