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If f : X -> Y and a, b ⊆ X, then f (a ∩ b) is equal to

Question

If f : X -> Y and a, b ⊆ X, then f (a ∩ b) is equal to

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Solution

The statement is referring to the properties of functions in set theory. Specifically, it's about the image of the intersection of two subsets under a function.

The statement "f : X -> Y and a, b ⊆ X, then f (a ∩ b)" is incomplete. It seems like it's leading to state that the image of the intersection of two subsets under a function is equal to the intersection of the images of the two subsets under the function.

If that's the case, the complete statement would be: "If f : X -> Y and a, b ⊆ X, then f (a ∩ b) ⊆ f(a) ∩ f(b)".

This is known as one of the properties of functions in set theory. However, it's important to note that the reverse inclusion "f(a) ∩ f(b) ⊆ f (a ∩ b)" is not always true unless f is injective.

This problem has been solved

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