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JEE Mains · Maths · STD 12 - 3 and 4 . metrices and determinant

ધારો કે \(\mathrm{S}=\left\{\mathrm{m} \in \mathbf{Z}: \mathrm{A}^{\mathrm{m}^2}+\mathrm{A}^{\mathrm{m}}=3 \mathrm{I}-\mathrm{A}^{-6}\right\}\), જ્યાં \(\mathrm{A}=\left[\begin{array}{cc}2 & -1 \\ 1 & 0\end{array}\right]\). તો \(\mathrm{n}(\mathrm{S})\) = ___

  1. A 1
  2. B 2
  3. C 3
  4. D 4
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Answer & Solution

Correct Answer

(B) 2

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Detailed explanation

\(A=\left[\begin{array}{cc} 2 & -1 \\ 1 & 0 \end{array}\right]\) Now finding characteristic equation…
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