2, then rank of (pq) is . let a be a 4 x 4 matrix with real entries such that -1, 1, 2, -2 are its eigen values if b a3- 5a + 1, then det (a + b) = 17. 1 2 2 le

2, then rank of (PQ) is . Let A be a 4 x 4 matrix with real entries such that -1, 1, 2, -2 are its eigen values If B A3- 5A + 1, then det (A + B) = 17. 1 2 2 Let A 21 2. If M(x) = 12 + a + B is the minimal polynomial then a = 18/ 2 2 1