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10 Nov 2019
please explain fully
Let (S,*) be a set with an associative binary operation with identity e. Prove that if x and y in S are invertible then x * y is invertible and that (x * y)-1 = y-1*x-1.
please explain fully
Let (S,*) be a set with an associative binary operation with identity e. Prove that if x and y in S are invertible then x * y is invertible and that (x * y)-1 = y-1*x-1.
Nelly StrackeLv2
3 Oct 2019