Answer
$2$
Work Step by Step
We want to break down the number $4$ to a smaller base raised to a power:
$(2^2)^{1/2}$
Raising a power to a power means we can multiply the two exponents together, keeping the same base:
$2^{(2)(1/2)}$
Multiply to simplify the exponents:
$2^{2/2}$
Reduce the fraction in the exponent by dividing both numerator and denominator by $2$, the greatest common factor:
$2^{1}$
When we raise a number to the power of $1$, then the number can just be written as the base without an exponent:
$2$
