Write down all possible proper subsets of `(i) {1,2}` `(ii) {1,2,3}` – InterviewSolution

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1.	Write down all possible proper subsets of `(i) {1,2}` `(ii) {1,2,3}`
Answer» 1)`A={1,2}` `X={}{1}{2}` 2)`A={1,2,3}` `X=[{}{1}{2}{3}{1,2}{1,3}{2,3}]`.

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