Suppose A is any 3 × 3 non-singular matrix and (A – 3I) (A – 5I) = O, where I = I_3 and O = O_3. If A + A^ -1...

Question

Suppose A is any 3 × 3 non-singular matrix and (A – 3I) (A – 5I) = O, where I = I_3 and O = O_3. If A + A^ -1 = 4I, then + is equal to -

Accepted Answer

(A)

JEE Main 2018 Mathematics question