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

मान लीजिए \(A\) एक \(3 \times 3\) क्रम का आव्यूह है और \(|A|=5\)। यदि \(|2 \operatorname{adj}(3 \mathrm{~A} \operatorname{adj}(2 \mathrm{~A}))|=2^\alpha \cdot 3^\beta \cdot 5^\gamma \alpha, \beta, \gamma \in \mathrm{N}\) तो \(\alpha+\beta+\gamma\) = ___

  1. A \(25\)
  2. B \(26\)
  3. C \(27\)
  4. D \(28\)
Verified Solution

Answer & Solution

Correct Answer

(C) \(27\)

Step-by-step Solution

Detailed explanation

\begin{aligned} & |2 \operatorname{adj}(3 \mathrm{~A} \operatorname{adj}(2 \mathrm{~A}))| \\ & 2^3 \cdot|3 \mathrm{~A} \operatorname{adj}(2 \mathrm{~A})|^2 \\ & 2^3 \cdot\left(3^3\right)^2 \cdot|\mathrm{~A}|^2 \cdot|\operatorname{adj}(2 \mathrm{~A})|^2 \\ & 2^3 \cdot 3^6…

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