2nd PUC Mathematics Series 5 December 3, 2020December 22, 2020wefruPUC Science 2nd Year Mathematics Series-5 quiz 0 Created on December 02, 2020 By wefru2nd PUC Mathematics Series 5TEST YOUR KNOWLEDGE OF SCIENCE 1 / 1041. If A and B are symmetric matrices of the same order, then AB is a symmetric matrix A – Bis askew-symmetric matrix AB + BA is a symmetric matrix AB – BA is a symmetric matrix 2 / 1042. If A is a square matrix, then A – A’ is a diagonal matrix skew-symmetric matrix symmetric matrix none of these 3 / 1043. If A is any square matrix, then which of the following is skew-symmetric? A + AT A – AT AAT ATA 4 / 1044. For any square matrix A, AAT is a unit matrix symmetric matrix skew-symmetric matrix diagonal matrix 5 / 1045. If a matrix A is both symmetric and skew-symmetric, then A is a diagonal matrix A is a zero matrix A is a scalar matrix A is a square matrix 6 / 1046. If A2 – A + I = O, then the inverse of A is I – A A – I A A + I 7 / 1047. Total number of possible matrices of order 3 × 3 with each entry 2 or 0 is 512 125 123 654 8 / 1048. If A is a matrix of order m × n and B is a matrix such that AB’ and B’A are both defined, then the order of matrix B is m × m n × n n × m m × n 9 / 1049. If A and B are matrices of the same order, then (AB’ – BA’) is a skew-symmetric matrix null matrix symmetric matrix unit matrix 10 / 1050. If A is a square matrix such that A2 = I, then (A – I)3 + (A + I)3 – 7A is equal to A AAA AA AAAA Your score isThe average score is 0% LinkedIn Facebook Twitter VKontakte 0% Restart quiz
