Show that `A nnB = A nnB`implies `A = B` – InterviewSolution

InterviewSolution

1.	Show that `A nnB = A nnB`implies `A = B`
Answer» let a be an element `a in A` then `a in (A uu B)` `=> a in (A nn B)` (given) so, `a in B` if `b in B` then `b in (A uu B)` `=> b in (A nn B) => b in A` that means for all `a in A, a in B & b in B, b in A` so, `A=B` hence proved

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