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Questions  

The matrix [3x2224x1241x]  is singular, then the value of x  is

a
0,  3
b
0,  4
c
3,  4
d
3,  −3

detailed solution

Correct option is A

If the given matrix is singular, then3-x2224-x1-2-4-1-x=0                                                                      ⇒  −x(3−x)2=0.Hence, the given matrix is singular for x=0,  3.

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