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Question

Write down all possible subsets of each of the following sets :

(i) {a} (ii) {0, 1}

(iii) {a, b, c}


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Solution

(i) We know that , if a set has n eleents, then its power set has 2n elements. Hence, n= 1, so there 21=2 subsets of the given set. The possible subsets are ϕ, {a}.

(ii) The set has two elements, so power set has 22=4 elements, namely ϕ, {0}, {1}, {0, 1}.

(iii) The set has 3 elements, so power set has 23=8 elements, namely ϕ, {a}, {b}, {c}, {a, b}, {b, c}, {a, c}, {a, b, c}.


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