MathsJEE Main 2 Apr 2026, Shift 2·Q22·Numerical·Easy–moderate

Matrices & Determinants · Inverse of a matrix

Consider the matrices

A = \begin{bmatrix} 2 & -2\\ 4 & -2\end{bmatrix} \quad\text{and}\quad B = \begin{bmatrix} 3 & 9\\ 1 & 3\end{bmatrix}.

If matrices

P

and

Q

are such that

PA = B

and

AQ = B

, then the absolute value of the sum of the diagonal elements of

2(P + Q)

is .

We corrected a printing error in the original paper

Source printed “B” directly followed by the matrix, without the “=” sign.

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