MCQMediumJEE Main 2026 · 28 January, Shift 1Inverse & Adjoint of a Matrix

Mathematics Question from JEE Main 2026 · 28 January, Shift 1

Let A,B,CA, B, C be three 2×22\times2 matrices with real entries such that B=(I+A)1B=(I+A)^{-1} and A+C=IA+C=I. If BC=[1512]BC=\begin{bmatrix}1 & -5\\-1 & 2\end{bmatrix} and CB[x1x2]=[126]CB\begin{bmatrix}x_1\\x_2\end{bmatrix}=\begin{bmatrix}12\\-6\end{bmatrix}, then x1+x2x_1+x_2 is:

  • A

    44

  • B

    00

  • C

    2-2

  • D

    22

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