Mark the correct alternative in the following: For two sets iff

Question

Philoid · Accepted Answer

If A⋃B=A

Then, any element is in B then it is in A⋃B=A

So, B⊂A

If B⊂A

Then, any element of A⋃B is in A.

So, A⋃B=A

Hence, A⋃B=A iff B⊂A