JEE PYQ: Matrices And Determinants Question 28
Question 28 - 2021 (26 Feb Shift 1)
Let $A$ be a symmetric matrix of order $2$ with integer entries. If the sum of the diagonal elements of $A^2$ is $1$, then the possible number of such matrices is:
(1) $6$
(2) $1$
(3) $4$
(4) $12$