Discrete Mathematics, Mathematics, Mathematics Education, Study Guide, Computer Science.
No. By definition of equality of ordered pairs, (1, 2) = (2, 1) if, and only if, 1 = 2 and 2 = 1. But 1 ≠ 2, and so the ordered pairs are not equal. b. Yes. By definition of equality of ordered pairs c. In the ordered pair (1, 1), the first and the second elements are both 1. Example 1.2.6 —