Question

If A ⊂ B, then A - B = _________​

Answer 1

Step-by-step explanation:

A C B implies that all elements of A are in B but all elements of B are not in A.

So A-B will be (A - elements of B in A)

Therefore, A-B will be {} (null set)

Answer 2

Answer:

Since it is given that A is a subset of B, this means that every element of A is also an element of B and there is no such element in set A which is not an element of set B.

So, A - B = phi or { }