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Mathematics
Problem
The system of equations
α
x
+
y
+
z
=
α
−
1
,
\alpha x + y + z = \alpha - 1,
α
x
+
y
+
z
=
α
−
1
,
x
+
α
y
+
z
=
α
−
1
x + \alpha y + z = \alpha - 1
x
+
α
y
+
z
=
α
−
1
x
+
y
+
α
z
=
α
−
1
x + y + \alpha z = \alpha - 1
x
+
y
+
α
z
=
α
−
1
has no solution if
α
\alpha
α
is a. not
−
2
-2
−
2
b. 1 c.
−
2
-2
−
2
d. Either
−
2
-2
−
2
or 1
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