# How do you evaluate the function k(n) = 2n^2, for k(3)?

Jul 23, 2015

You simply make $n$ equal to 3.

#### Explanation:

You know that your function looks like this

$k \left(n\right) = 2 {n}^{2}$

This means that, for any value of $n$, you need to square this value and multiply it by 2 to get the value of the function.

This means that $k \left(3\right)$, which simply means that you evaluate the function when $n = 3$, will be equal to

k(3) = 2 * 3""^2 = 2 * 9 = color(green)(18)