Evaluate Using the Given Value f(4)=2 square root of 4

$f (4) = 2 \sqrt{4}$

Step 1

Rewrite $4$ as $2^{2}$ .

$f (4) = 2 \sqrt{2^{2}}$

Step 2

Pull terms out from under the radical, assuming positive real numbers.

$f (4) = 2 \cdot 2$

Step 3

Multiply $2$ by $2$ .

$f (4) = 4$