Let A = x and B = x . Find A B.

Question

Let A = x < 5 and B = x . Find A B.

Answer 1

A B = x

Explanation:

The domain of A B will be given by x

The domain of A is given as x < 5 while that of B is x ≤ 7. From this we can infer that the domain of A is a subset of B since A is contained in B. The domain of A B is simply the intersection of these two sets which is A.