# GATE Papers >> ECE >> 2015 >> Question No 15

Question No. 15

The value of $p$ such that the vector $\left[\begin{array}{c}1\\ 2\\ 3\end{array}\right]$ is an eigenvector of the matrix $\begin{bmatrix}4&1&2\\p&2&1\\14&-4&10\end{bmatrix}$ is_______.