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Matrices and Determinants question

2017 · Shift 0 · Q29
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  5. /2017 · Shift 0 · Q29

Matrices and Determinants question

2017 · Shift 0 · Q29

JEE MainMathematicsMatrices and DeterminantsMCQ+4 / −1
If A=[2−3−41]A = \left[ {\begin{matrix} 2 & { - 3} \\ { - 4} & 1 \\ \end{matrix} } \right]A=[2−4​−31​], then adj(3A2 + 12A) is equal to
  1. A
    [51638472]\left[ {\begin{matrix} {51} & {63} \\ {84} & {72} \\ \end{matrix} } \right][5184​6372​]
  2. B
    [51846372]\left[ {\begin{matrix} {51} & {84} \\ {63} & {72} \\ \end{matrix} } \right][5163​8472​]
  3. C
    [72−63−8451]\left[ {\begin{matrix} {72} & {-63} \\ {-84} & {51} \\ \end{matrix} } \right][72−84​−6351​]
  4. D
    [72−84−6351]\left[ {\begin{matrix} {72} & {-84} \\ {-63} & {51} \\ \end{matrix} } \right][72−63​−8451​]
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