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