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Question
If A−B=ϕ and B−A=ϕ, then A and B are _________
If A−B=ϕ and B−A=ϕ, then A and B are _________
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Solution
The correct option is A Equal
If A−B=ϕ then this means all the elements of A are in B. Similarly, If B−A=ϕ then this means all the elements of B are in A
Hence this implies A=B
If A−B=ϕ then this means all the elements of A are in B.
Similarly, If B−A=ϕ then this means all the elements of B are in A
Hence this implies A=B
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