The square root of a number is 2k. What is half of the number
- \(\sqrt{\frac{k}{2}}\)
- \(\sqrt{k}\)
- \(\frac{1}{2}k^2\)
-
2k2
The correct answer is: D
Explanation
Let the number be x.
\(\sqrt{x} = 2k \implies x = (2k)^2\)
= \(4k^2\)
\(\frac{1}{2} \times 4k^2 = 2k^2\)