Chapter 5.1, Problem 5EQ

In Exercises 1-6, determine which sets of vectors are orthogonal.

$\left[\begin{array}{c}2\\ 3\\ -1\\ 4\end{array}\right],\left[\begin{array}{c}-2\\ 1\\ -1\\ 0\end{array}\right],\left[\begin{array}{c}-4\\ -6\\ 2\\ 7\end{array}\right]$