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Matrices and Determinants question

2021 · 27 Aug · Shift 1 · Q25

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JEE Main
Mathematics
Matrices and Determinants
2021 · 27 Aug · Shift 1 · Q25

Matrices and Determinants question

2021 · 27 Aug · Shift 1 · Q25

JEE MainMathematicsMatrices and DeterminantsMCQ+4 / −1

If the matrix

A = \left( {\begin{matrix} 0 & 2 \\ K & { - 1} \\ \end{matrix} } \right)

satisfies

A({A^3} + 3I) = 2I

, then the value of K is :

A
${1 \over 2}$
B
$-{1 \over 2}$
C
$-$ 1
D
1

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