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Write set {1, 5, 15, 25,…} in set-builder form.(a) {x: either x=1 or x=5n, where n is a real number}(b) {x: either x=1 or x=5n, where n is a integer}(c) {x: either x=1 or x=5n, where n is an odd natural number}(d) {x: x=5n, where n is a natural number}This question was posed to me in an online quiz.My query is from Types of Set topic in chapter Basic Structures: Sets, Functions, Sequences, Sums and Matrices of Discrete Mathematics

Answer»

The correct option is (c) {x: either x=1 or x=5n, where n is an odd NATURAL NUMBER}

For EXPLANATION: Set should INCLUDE 1 or an odd multiple of 5.



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