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Class 12 Maths Practice Test - Adjoint and Inverse of a Matrix
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Avg score: 90% • Most missed: “If A=\(\begin{bmatrix}5&-8\\2&6\end{bmatrix}\), find A(adj A).”
Class 12 Maths Practice Test - Adjoint and Inverse of a Matrix
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10 Questions

1. Which of the following is the formula for calculating the inverse of the matrix?
2. Which of the below condition is incorrect for the inverse of a matrix A?
3. Find the inverse of the matrix A=\(\begin{bmatrix}8&5\\4&1\end{bmatrix}\).
4. Which of the following formula is incorrect?
5. If A=\(\begin{bmatrix}-8&2\\6&-3\end{bmatrix}\) and B=\(\begin{bmatrix}2&1\\1&7\end{bmatrix}\). Find (AB)-1.
6. If A=\(\begin{bmatrix}1&0\\9&4\end{bmatrix}\), then (adj A)A is ______________
7. A square matrix A is said to be non-singular if |A|≠0.
8. Which of the following is the adjoint of the matrix A=\(\begin{bmatrix}1&5\\3&4\end{bmatrix}\)?
9. Which of the below given matrices has the inverse \(\frac{1}{-6}\begin{bmatrix}2&1\\0&-3\end{bmatrix}\)?
10. If A=\(\begin{bmatrix}5&-8\\2&6\end{bmatrix}\), find A(adj A).

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