If A = {5, 6, 7}, B = {1, 2, 3, 4, 5} and f: A → B is defined by f(x – InterviewSolution

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1.

If A = {5, 6, 7}, B = {1, 2, 3, 4, 5} and f: A → B is defined by f(x) = x – 2, then the range of f is …(1) {1, 4, 5}(2) {1, 2, 3, 4, 5}(3) {2, 3, 4}(4) {3, 4, 5}

Answer»

(4) {3, 4, 5}

f(x) = x – 2

f(5) = 5 – 2 = 3

f(6) = 6 – 2 = 4

f(7) = 7 – 2 = 5

Range of f = {3, 4, 5}

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