Question

evaluate. write your answer as a fraction or whole number without exponents. 2^{-1} =

Explanation:

Step1: Apply negative - exponent rule

According to the rule $a^{-n}=\frac{1}{a^{n}}$, when $a = 2$ and $n = 1$, we have $2^{-1}=\frac{1}{2^{1}}$.

Step2: Simplify the expression

Since $2^{1}=2$, then $\frac{1}{2^{1}}=\frac{1}{2}$.

Answer:

$\frac{1}{2}$