Let `Aa n dB` be two non-empty sets having `n` elements in common, then prove that `AxxBa n dBxxA` have `n^2` elements in common.

If A and B are two non-empty sets having n elements in common, then prove that Axx B and B xx A have n^2 elements in common.

A and B are two non empty set having n element in common ; then prove that AxxB and BxxA have n^2 element in common.

If A and B are two non-empty sets having n elements in common , then show that A xx B and B xx A have n^2 elements in common.

Theorem 9(A and B are two non empty set having n element in common; then prove that A xx B and B xx A have n^(2) element in common.)

If two-empty sets A and B have n elements in common, then show that AxxB and BxxA have n^(2) elements in common.

Let Aa n dB be two sets. Show that the sets AxxB a n dBxxA have an element in common iff the sets Aa d nB have an element in common.

If A and B are two non-empty sets having n elements in common,then what is the number of common elements in the sets A xx B and B xx A?

Two sets having no element in common are called "_____" sets.