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Roster Form

Let A = {1, 2, 4, 5, 8, 64, 625}. Define R on A by x R y if x3 = y. In this case we explicitly list all the members of the relation. For instance, R = {(1, 1), (2, 8), (4, 64), (5, 25)}. This form of representing a relation is called the roster form.

A relation form A = {March, May, September, October, December} to B = {February, April, June, October, November} is defined as x R y if x comes before y. The roster form of this relation is R = {(March, April), (May, June), (September, October), (October, November)}

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