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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

  1. A \(\frac{1}{3}\)
  2. B \(3\)
  3. C \(27\)
  4. D \(9\)
Verified Solution

Answer & Solution

Correct Answer

(D) \(9\)

Step-by-step Solution

Detailed explanation

\(\left|3 \mathrm{~A}^{-1}\right|=3^3 \frac{1}{3}=9\)