If $A = \{x : x$ positive integer$\}$ and $B = \{x : x$ negative integer$\}$, then $A$ and $B$ are:

Question

Accepted Answer

disjoint

Answer

equal

Answer

equivalent only

Answer

universal

If A={x:xA = \{x : xA={x:x positive integer}\}} and B={x:xB = \{x : xB={x:x negative integer}\}}, then AAA and BBB are: