If f(a)=f(b) implies that a = b then f is

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

For all subsets A and B of X, F(A-B) = F(A)-F(B). Determine it's true or false

If f : X -> Y and a, b ⊆ X, then f (a ∩ b) is equal toans.f(b) - f(a)a proper subset of f(a) ∩ f(b)f(a) ∩ f(b)f(a) - f(b)

Which of the following is not true?*Every function from the set A to the set B is a relation from the set A to the set B.If f is a function from A to B and (a, b) ∈ f, then f(a) = b, where a is called the pre-image of b under f.Every relation from the set A to the set B is a function from the set A to the set B.If f is a function from A to B and (a, b) ∈ f, then f(a) = b, where b is called the image of a under f.

If f(x) = 3𝑥−3x−33​ , then f -1(x) =