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Problem
Problem
The number of values of
x
x
x
for which the matrix
A
=
[
3
−
x
2
2
2
4
−
x
1
−
2
−
4
−
1
−
x
]
A = \begin{bmatrix} 3-x & 2 & 2 \\ 2 & 4-x & 1 \\ -2 & -4 & -1-x \end{bmatrix}
A
=
3
−
x
2
−
2
2
4
−
x
−
4
2
1
−
1
−
x
is singular, is a. 0 b. 1 c. 2 d. 3
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