NVAMediumJEE Main 2025 · 3 April, Shift 2Inverse & Adjoint of a Matrix

Mathematics Question from JEE Main 2025 · 3 April, Shift 2

Let II be the identity matrix of order 3×33 \times 3 and for the matrix A=(λ23456712)A = \begin{pmatrix} \lambda & 2 & 3 \\ 4 & 5 & 6 \\ 7 & -1 & 2 \end{pmatrix}, A=1|A| = -1. Let BB be the inverse of the matrix adj(Aadj(A2))\operatorname{adj}(A \cdot \operatorname{adj}(A^2)). Then (λB+I)|(\lambda B + I)| is equal to _____

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