4. If  \(A=\begin{vmatrix}1 & 0 & 1 \\ 0 &  1 & 2 \\ 0 & 0 & 4 \end{vmatrix}\), then show that |3A|=27|A|.

Determinants

Exercise 4.1

Ncert Solutions class 12 chapter 4 exercise 1 question 4