If A = {1} and B = {{1}, 2} then show that A ⊄ B.

Question:

If A = {1} and B = {{1}, 2} then show that A ⊄ B.

Hint 1 ϵ A but 1⊄ B.

 

Solution:

There is only one element in set A.

Now, 1 is not an element of B.

Therefore, A ⊄ B.

 

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