What are examples of predicates $P(x)$ and $Q(x)$ and domains where the above two statements are equivalent?

My stab at the problem:

Let the domain of discourse be all positive whole numbers, $P(x)$ be defined as "$x \geq 0$, and $Q(x)$ be defined as $x + 1 \geq 0$. In this case, both the first statement and the second would evaluate to true... however, I don't know if this proves equivalency, because I don't think I can say that two statements are equivalent just because they both happen to evaluate to true. 

Any help is much appreciated. Thanks in advance!

EDIT: initially had $\land$'s when I should have had $\lor$'s...