Question

If $\sqrt{2^x}=16$, then $x=$

• A. $8$
• B. $4$
• C. $2$
• D. $10$

Answer 1

Answer: (A)

$8$

$\sqrt{2^x}=16\Rightarrow {\left(2\right)}^{\frac{x}{2}}=2^4$

Exponents should be equal.

$\frac{x}{2}=4\Rightarrow x=8$