For each of the following relations defined on sets M = {5, 6, 7, 8} and N = {1, 3, 5, 7, 9},list the elements and find its domain and range.(a) S1 = {(m, n)|m + n is even}(b) S2 = {(m, n)|n = 2m − 9}(c) S3 = {(m, n)|m < n}(d) S4 = {(m, n)||m − n| ≤ 2}(e) S5 = {(m, n)|m is divisible by n}(f) S6 = {(m, n)|m + n is a prime number
Question
For each of the following relations defined on sets M = {5, 6, 7, 8} and N = {1, 3, 5, 7, 9},list the elements and find its domain and range.(a) S1 = {(m, n)|m + n is even}(b) S2 = {(m, n)|n = 2m − 9}(c) S3 = {(m, n)|m < n}(d) S4 = {(m, n)||m − n| ≤ 2}(e) S5 = {(m, n)|m is divisible by n}(f) S6 = {(m, n)|m + n is a prime number
Solution
(a) S1 = {(m, n)|m + n is even} The elements of this relation are the pairs (m, n) such that the sum of m and n is an even number. The pairs are: {(5, 7), (5, 3), (5, 1), (6, 6), (6, 2), (7, 7), (7, 3), (7, 1), (8, 8), (8, 4), (8, 2)}. The domain is {5, 6, 7, 8} and the range is {1, 3, 5, 7}.
(b) S2 = {(m, n)|n = 2m − 9} The elements of this relation are the pairs (m, n) such that n equals 2m minus 9. The pairs are: {(6, 3), (7, 5), (8, 7)}. The domain is {6, 7, 8} and the range is {3, 5, 7}.
(c) S3 = {(m, n)|m < n} The elements of this relation are the pairs (m, n) such that m is less than n. The pairs are: {(5, 6), (5, 7), (5, 8), (5, 9), (6, 7), (6, 8), (6, 9), (7, 8), (7, 9)}. The domain is {5, 6, 7} and the range is {6, 7, 8, 9}.
(d) S4 = {(m, n)||m − n| ≤ 2} The elements of this relation are the pairs (m, n) such that the absolute difference between m and n is less than or equal to 2. The pairs are: {(5, 3), (5, 5), (5, 7), (6, 4), (6, 6), (6, 8), (7, 5), (7, 7), (7, 9), (8, 6), (8, 8)}. The domain is {5, 6, 7, 8} and the range is {3, 5, 7, 9}.
(e) S5 = {(m, n)|m is divisible by n} The elements of this relation are the pairs (m, n) such that m is divisible by n. The pairs are: {(5, 1), (6, 1), (6, 3), (7, 1), (8, 1)}. The domain is {5, 6, 7, 8} and the range is {1, 3}.
(f) S6 = {(m, n)|m + n is a prime number} The elements of this relation are the pairs (m, n) such that the sum of m and n is a prime number. The pairs are: {(5, 2), (6, 1), (6, 3), (7, 2), (8, 1), (8, 3)}. The domain is {5, 6, 7, 8} and the range is {1, 2, 3}.
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