KCET · Maths · Differentiation
If \(A\) is a square matrix of order 3 and \(|A|=5\), then \(\mid A\) adj. \(A \mid\) is
- A 5
- B 125
- C 25
- D 625
Answer & Solution
Correct Answer
(B) 125
Step-by-step Solution
Detailed explanation
Given, \(|A|=5\)
\(|\operatorname{Aadj} A|=|A|^{3}\)
\(|\operatorname{Aadj} A|=(5)^{3}=125\)
\(|\operatorname{Aadj} A|=|A|^{3}\)
\(|\operatorname{Aadj} A|=(5)^{3}=125\)
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