Question

Need help with order pairs:


List the ordered pairs in the relation R from A = {0, 1, 2, 3, 4} to B = {0, 1, 2, 3} where (a, b) ϵ R if and only if a + b = 4.

Answer 1

The brackets mean unordered pairs correct? {0,1,2,3,4} and {0,1,2,3} and for a & b to be ordered pairs a+b=4, Does that mean (4,0) are an ordered pair in the set of R? What other pairs equal 4 when paired?

Answer 2

So we will have:
(4,0) (3,1) (2,2) (1,3)

I think this is right