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Matrices and Determinants question

2021 · 20 Jul · Shift 1 · Q38
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Matrices and Determinants question

2021 · 20 Jul · Shift 1 · Q38

JEE MainMathematicsMatrices and DeterminantsNumerical+4 / −1
Let A=(1−1001−1001)A = \left( {\begin{matrix} 1 & { - 1} & 0 \\ 0 & 1 & { - 1} \\ 0 & 0 & 1 \\ \end{matrix} } \right)A=​100​−110​0−11​​ and B = 7A20 −-− 20A7 + 2I, where I is an identity matrix of order 3 ×\times× 3. If B = [bij], then b13is equal to ‾\underline{\hspace{2cm}}​.
Numerical answer
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