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

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

Answers (1)

Answer:

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}.

Posted by

Gurleen Kaur

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