6. If A is a skew symmetric matrix, then At -A b. . 0 d....

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6. If A is a skew symmetric matrix, then At -A b. А с. 0 d. diagonal matrix а. 7. The number of non-zero rows in an echelon form is called? а. Rank of the matrix b. Reduced echelon matrix с. Trace of the matrix d. Conjugate of the matrix 8. Two matrices A and B are multiplied to get AB if both are rectangular а. b. both have same order с. no. of columns of A is equal to columns of B d. no. of rows of A is equal to no. of columns of B 9. The characteristic roots of two matrices A and BAB-1 are : Same b. Unequal c. Inverse d. Always zero а. 10. A matrix whose each element is zero is called Null matrix b. Identity matrix c. Scalar matrix d. Triangular matrix а. 6. If A is a skew symmetric matrix, then At -A b. А с. 0 d. diagonal matrix а. 7. The number of non-zero rows in an echelon form is called? а. Rank of the matrix b. Reduced echelon matrix с. Trace of the matrix d. Conjugate of the matrix 8. Two matrices A and B are multiplied to get AB if both are rectangular а. b. both have same order с. no. of columns of A is equal to columns of B d. no. of rows of A is equal to no. of columns of B 9. The characteristic roots of two matrices A and BAB-1 are : Same b. Unequal c. Inverse d. Always zero а. 10. A matrix whose each element is zero is called Null matrix b. Identity matrix c. Scalar matrix d. Triangular matrix а.