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Matrices and Determinants question

2004 · Shift 0 · Q79

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JEE Main
Mathematics
Matrices and Determinants
2004 · Shift 0 · Q79

Matrices and Determinants question

2004 · Shift 0 · Q79

JEE MainMathematicsMatrices and DeterminantsMCQ+4 / −1

Let

A = \left( {\begin{matrix} 1 & { - 1} & 1 \\ 2 & 1 & { - 3} \\ 1 & 1 & 1 \\ \end{matrix} } \right).

and

10

B = \left( {\begin{matrix} 4 & 2 & 2 \\ { - 5} & 0 & \alpha \\ 1 & { - 2} & 3 \\ \end{matrix} } \right)

. if

B

is the inverse of matrix

A

, then

\alpha

is

A
$5$
B
$-1$
C
$2$
D
$-2$

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