Consider the system of equations x + y + z = 1, 2x + 3y + 2z = 1, 2x + 3y + (a2 -1)z = a + 1 then
1
System has a unique solution for |a| = √3
2
System is inconsistence for |a| = √3
3
System is inconsistence for a = 4
4
System is inconsistence for a = 3