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Matrices and Determinants question

2022 · 26 Jul · Shift 2 · Q39
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Matrices and Determinants question

2022 · 26 Jul · Shift 2 · Q39

JEE MainMathematicsMatrices and DeterminantsNumerical+4 / −1
The number of matrices A=(abcd)A=\left(\begin{array}{ll}a & b \\ c & d\end{array}\right)A=(ac​bd​), where a,b,c,d∈{−1,0,1,2,3,……,10}a, b, c, d \in\{-1,0,1,2,3, \ldots \ldots, 10\}a,b,c,d∈{−1,0,1,2,3,……,10}, such that A=A−1A=A^{-1}A=A−1, is ‾\underline{\hspace{2cm}}​.
Numerical answer
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