Determine which if any of the following three expressions re

Determine which, if any, of the following three expressions represents the shaded region in the following diagram. Here An denotes the nth white square in the infinite sequence of white squares shown; the unit square itself is represented by U. [Recall that the set difference A \\ B is the collection of points that are in A and not in B.]

Solution

All white area represents union of all A\'s. Therefore the shaded region will be the complement of the union of all A\'s. The correct option is B.