Let f be a function from the set a to the set b. let s and t be subsets of a. show that

[Dhanalakshmi]

Let f be a function from the set A to the set B. Let S and T be subsets of A. Show that a) f (S ∪ T) = f (S) ∪ f (T). b) f (S ∩ T) ⊆ f (S) ∩ f (T).