Let $A = \{x : x \in \mathbb{N} ext{ and } 2x - 1 = 0\}$. Then $A$ is:

Question

Let $A = \{x : x \in \mathbb{N} 	ext{ and } 2x - 1 = 0\}$. Then $A$ is:

Accepted Answer

D. finite (specifically, empty)

$2x - 1 = 0 \Rightarrow x = 1/2$, which is *not* a natural number. So no natural number satisfies the condition — $A = \phi$, which is **finite** (zero elements).
The empty set is *finite*, since *finite* means *has a definite number of elements* (including zero).

Answer

infinite

Answer

a singleton set

Answer

equal to $\{1/2\}$

Let $A = \{x : x \in \mathbb{N} \text{ and } 2x - 1 = 0\}$. Then $A$ is: