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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 11 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 11 maths textbook solution

Answers (1)

VSQ : 11

Answer : 81

Given : A is square matrix of order 3 such that \left | A \right |=3

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

Solution : \left | A \right |=3

\left | adj\left ( adjA \right ) \right |=\left | A \right |^{\left ( n-1 \right )^{2}}

=3^{\left ( 3-1 \right )^{2}}           (n=3) & \left ( \left | A \right |=3 \right )

=3^{4}

\left |adj\left ( adjA \right ) \right |=81

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