blackstreet23
  • blackstreet23
Let A = {4, 5, 6} and B = {5, 6, 7} and define relations R, S, and T from A to B as follows: For all (x, y) ∈ A × B, (x, y) ∈ R means that x ≥ y. (x, y) ∈ S means that x − y/ 2 is an integer. T = {(4, 7), (6, 5), (6, 7)}. a. Draw arrow diagrams for R, S, and T . b. Indicate whether any of the relations R, S, and T are functions.
Discrete Math
  • Stacey Warren - Expert brainly.com
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SOLVED
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schrodinger
  • schrodinger
I got my questions answered at brainly.com in under 10 minutes. Go to brainly.com now for free help!
jim_thompson5910
  • jim_thompson5910
Do you know what the notation `(x, y) ∈ A × B` means?
blackstreet23
  • blackstreet23
yes
blackstreet23
  • blackstreet23
coordinates that belong to the cross section of A and b

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blackstreet23
  • blackstreet23
or maybe not lol. Could you explain just in case i may have a gap with that
blackstreet23
  • blackstreet23
@jim_thompson5910
jim_thompson5910
  • jim_thompson5910
A X B is a set of all ordered pairs (x,y) such that x is in A, y is in B what I like to do is make a table that is 3x3. 3 rows because there are 3 elements in B 3 columns because there are 3 elements in A along the top, I put the elements of set A along the left side, I put the elements of set B |dw:1443397063622:dw|
blackstreet23
  • blackstreet23
I got R correctly. but i dont get the right answer for S
blackstreet23
  • blackstreet23
For R i just followed the condition
jim_thompson5910
  • jim_thompson5910
actually it might be better to swap the places of A and B |dw:1443397190016:dw|
jim_thompson5910
  • jim_thompson5910
to fill out this table, we simply list the points (x,y) where x comes from A, y comes from B eg: (4,5) goes in the top left because we have 4 from A, and 5 from B |dw:1443397266909:dw|
jim_thompson5910
  • jim_thompson5910
are you able to fill out the rest of this table?
blackstreet23
  • blackstreet23
yes i think i got it. Thanks you a lot !
jim_thompson5910
  • jim_thompson5910
ok tell me what you get

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