Question

What is the value of f (x)=16^x when x=1/2 ? A. 2 B. 4 C. 8 D. 32

Answer 1

Answer:

B

Step-by-step explanation:

Using the rule of exponents

$a^{\frac{m}{n} }$ ⇔ $\sqrt[n]{a^{m} }$

Given

f(x) = $16^{x}$, then when x = $\frac{1}{2}$

f($\frac{1}{2}$ ) = $16^{\frac{1}{2} }$ = $\sqrt[2]{16}$ = 4