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

माना \(A =\left[\begin{array}{ll} x & 1 \\ 1 & 0\end{array}\right], x \in R\) तथा \(A ^{4}=\left[ a _{ ij }\right]\) है। यदि \(a _{11}\) \(=109\) है, तो \(a _{22}\) बराबर है |

  1. A \(10\)
  2. B \(-8\)
  3. C \(-10\)
  4. D \(8\)
Verified Solution

Answer & Solution

Correct Answer

(A) \(10\)

Step-by-step Solution

Detailed explanation

\(A=\left[\begin{array}{ll}x & 1 \\ 1 & 0\end{array}\right]\) \(A^{2}=\left[\begin{array}{ll}x & 1 \\ 1 & 0\end{array}\right]\left[\begin{array}{ll}x & 1 \\ 1 & 0\end{array}\right]=\left[\begin{array}{cc}x^{2}+1 & x \\ x & 1\end{array}\right]\)…
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