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  • Explain solution RD Sharma class 12 Chapter 6 Adjoint and Inverse of a Matrix exercise Fill in the blanks question 7

Explain solution RD Sharma class 12 Chapter 6 Adjoint and Inverse of a Matrix exercise Fill in the blanks question 7

Answers (1)

best_answer

Answer   \rightarrow 100

Hint  \rightarrow A(\operatorname{adj} A)=|A| I

Given \rightarrow A   is a square matrix of order 2 such that   A(\operatorname{adj} A)=\left[\begin{array}{cc} 10 & 0 \\ 0 & 10 \end{array}\right]

Explanation

                \begin{aligned} &\rightarrow A(\operatorname{adj} A)=|A| I \\ &=\left|\begin{array}{cc} 10 & 0 \\ 0 & 10 \end{array}\right| \\ &=100-0 \\ &=100 \end{aligned}

               

               

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