The ordered pair (a, b) can be defined in terms of sets as
(a, b) = {{a}. {a, b}}.
Taking the preceding equation as the definition of ordered pair, prove that (a, b) = (c, d) if and only if a = c and b = d.
We need at least 10 more requests to produce the solution.
0 / 10 have requested this problem solution
The more requests, the faster the answer.