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Vaishnavi mishra Asked a Question
January 6, 2022 9:13 ampts 30 pts
L2. Let us assume that a is mapping from a set S to itself and a(a(x))=x for all x in S. Then a is (a) Only one to one (c) Permutation (d) One-to-one and onto (b) Onto only
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  • Navdeep goyal 1 thankyou
    consider two elements x and y such that, a(a(x))=a(a(y) x=y therefore S is one-to-one.bcz a is mapping from s to itself a is a permutations
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