#### Need solution for RD Sharma maths class 12 chapter Determinants exercise multiple choise question 3

Correct option (d)

Hint:

If A is a square matrix of order n, then

$det(A)=a_{11}c_{11}+a_{21}c_{21}+a_{31}c_{31}$

Given:

$A=\begin{vmatrix} a_{11} &a_{12} &a_{13} \\ a_{21} &a_{22} &a_{23} \\ a_{31} &a_{32} &a_{33} \end{vmatrix}\; \; and\; \; c_{ij}\; is\; co\! f\! actor\; o\! f\; a_{ij}\; in\; A$

We have to find the value of |A|.

Solution:

We know that,

If  A is a square matrix of order n, then

$det(A)=a_{11}c_{11}+a_{21}c_{21}+a_{31}c_{31}$.