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Question

If , find .

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Solution

The given matrix is,

A=[ 1 1 2 2 1 3 5 4 9 ]

Determinant of the given matrix is,

| A |=| 1 1 2 2 1 3 5 4 9 | =1| 1 3 4 9 |1| 2 3 5 9 |+( 2 )| 2 1 5 4 | =3( 1×( 9 )( 3 )×4 )1( 2×( 9 )5×( 3 ) )2( 2×( 4 )1×5 ) =0

Thus, the value of determinant is 0.


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