# Basic Maths - Grand Test 1 -Q4

Let $A$ be a square matrix of order 3 with real entries such that determinant of $A$ is 6 and trace of $A$ is zero. If the determinant of matrix $(A+I)$ is zero, where I denote the $3\times 3$ identity matrix, then one of the eigenvalues of $A$ is _____

$(A).1$

$(B).2$

$(C).-3$

$(D).3$

reshown Jun 23