The number of non-zero values of k for which the linear equations
4x + ky + z = 0
kx + 4y + z = 0
2x + 2y + z = 0
possess a non-zero solution is:
1
2
2
1
3
0
4
3
The number of non-zero values of k for which the linear equations
4x + ky + z = 0
kx + 4y + z = 0
2x + 2y + z = 0
possess a non-zero solution is: