My answer is not matching what I did :

First it's a triangular matrix so eigen values will be 3, -2 , 1.

We know AX = LX where X = Eigen vector

L = Eigen value and A is matrix.

Now I placed value of X from option for different value of L none of the option matches :(

First it's a triangular matrix so eigen values will be 3, -2 , 1.

We know AX = LX where X = Eigen vector

L = Eigen value and A is matrix.

Now I placed value of X from option for different value of L none of the option matches :(