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

यदि \(3 \times 3\) का एक आव्यूह \(A\) है तथा \(|A|=2\) है, तो \(\left|3 \operatorname{adj}\left(|3 A| A^2\right)\right|\) बराबर है :

  1. A \(3^{11} \cdot 6^{10}\)
  2. B \(3^{12} \cdot 6^{10}\)
  3. C \(3^{10} \cdot 6^{11}\)
  4. D \(3^{12} \cdot 6^{11}\)
Verified Solution

Answer & Solution

Correct Answer

(A) \(3^{11} \cdot 6^{10}\)

Step-by-step Solution

Detailed explanation

\(\left|3 \operatorname{adj}\left(|3 A| A^2\right)\right|=3^3\left|\operatorname{adj}\left(54 A^2\right)\right|=3^3 \cdot\left|54 A^2\right|^2\) \(=3^3 \times 54^0 \times|A|^4=3^{11} \times 6^{10}\)
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