KCET · Maths · Determinants
If \(A\) is a square matrix of order \(3 \times 3, \operatorname{det} A=3\), then the value of \(\operatorname{det}\left(3 A^{-1}\right)\) is
- A \(\frac{1}{3}\)
- B \(3\)
- C \(27\)
- D \(9\)
Answer & Solution
Correct Answer
(D) \(9\)
Step-by-step Solution
Detailed explanation
\(\left|3 \mathrm{~A}^{-1}\right|=3^3 \frac{1}{3}=9\)
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