Let A= bmatrix a&1 1&b bmatrix , where a and b are the roots of the equation x^2 - 4x + 2 = 0. If A + A^ -1 =...

Question

Let A= bmatrix a&1 1&b bmatrix , where a and b are the roots of the equation x^2 - 4x + 2 = 0. If A + A^ -1 = kI_2, then the value of k is _____

Accepted Answer

(C)

MHT CET 2026 Mathematics question