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  • Explain Solution for RD Sharma Maths Class 12 Chapter 6 Adjoint and inverse of a Matrix Exercise very short answer type Question 3 maths textbook solution

Explain Solution for RD Sharma Maths Class 12 Chapter 6 Adjoint and inverse of a Matrix Exercise very short answer type Question 3 maths textbook solution

Answers (1)

VSQ : 3

Answer : 25

Given : A is a square matrix of order 3 and \left | A \right |=5

Hint : use the formula of adj\left ( A \right )

solution :

n=3 & \left | A \right |=5

We know that 

\begin{aligned} &|a d j A|=|A|^{n-1} \\ &=(5)^{3-1} \quad(n=3 \&|A|=5) \\ &=5^{2} \\ &|a d j A|=25 \end{aligned}

 

 

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