Math Chapter Wise question with answer

Q01 If α and β are the roots of the equation x2 + x + 1 = 0 then 1 β α β α β equals: English · EMRS PGT-2023 Q02 If A = (aij)2×2 and aij = ≠ 2 2 i + j;i j i – j;i = j, then A–1 is equal to - English · RPSC PGT 2022 Q03 If a matrix 5 8 6 3 2 4 1 7 9 is expressed as A+B, where A is symmetric and B is skew - symmetric, then B is equal... English · UPPSC GIC 2021 Q04 If A and B are two matrices such that AB = B and BA = A, then A2 + B2 is equal to English · UP TGT 2021 Q05 If 1 –2 A = –1 2 and 2 6 B = 1 3 then AB is equal to English · UP TGT 2021 Q06 If 1 1 1 A 1 2 3 2 1 3 = − − and A3 – 6A2 + 5A + 11 I = 0, where I is a 3×3 identity matrix, then A-1 is equal to: English · UKPSC Lecturer (Mains) 2020