Question

Let A be a 3 × 2 matrix with real entries. Let H = A(A^T A)^-1 A ^T

where A^T is the transpose of A and let I be the identity matrix of order 3 × 3. Then
(a) H^2 = I
(b) H^2 = -I
(c) H^2 = H.
(d) H^2 = −H.

Answer 1

(c) is the correct answer.....

Answer 2

Explanation:

we are one Exo.......exo saranghaja