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

જો \(A=\left[\begin{array}{cc}2 & 3 \\ 0 & -1\end{array}\right]\) હોય તો  \(\operatorname{det}\left( A ^{4}\right)+\operatorname{det}\left( A ^{10}-(\operatorname{Adj}(2 A ))^{10}\right)\) ની કિમંત મેળવો.

  1. A \(9\)
  2. B \(25\)
  3. C \(16\)
  4. D \(12\)
Verified Solution

Answer & Solution

Correct Answer

(C) \(16\)

Step-by-step Solution

Detailed explanation

\(2 A\) adj \((2 A )=|2 A | I\) \(\Rightarrow A\) adj \((2 A )=-4 I\) \(......(I)\) Now, \(E =\left| A ^{4}\right|+\mid A ^{10}-(\operatorname{adj}(2 A ))^{10}\) \(=(-2)^{4}+\frac{\left| A ^{20}- A ^{10}(\operatorname{adj} 2 A )^{10}\right|}{| A |^{10}}\)…
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