Top 150+ Solved Mathematics for Economic Analysis 1 MCQ Questions Answer
Q. For any square matrix A of order ‘n’, A +ATis
a. skew symmetric
b. non-skew symmetric
c. symmetric
d. non-symmetric
Q. If matrix A is a matrix of order nxm and B is another matrix of order mxn, then BA will be thematrix of order
a. nxm
b. mxn
c. nxn
d. mxm
Q. If A is a square matrix of order ‘n’ and I is the unit matrix of the same order, then AI is equal to
a. a
b. ia
c. i
d. both (a) & (b)
Q. If the ith raw and jth column of a square matrix of order ‘n’ are deleted, the determinant of theresulting square sub-matrix is called
a. adjoint
b. co-factor
c. minor
d. rank
Q. The determinant of a matrix and that of its transpose are
a. equal
b. zero
c. one
d. negatively related
Q. If every element of a raw or column of a square matrix A is zero, then the value of thedeterminant is
a. equal
b. one
c. zero
d. not equal
Q. If each element of a raw or column is a sum of two elements, the determinant can be expressed asthe
a. sum of two determinants
b. difference of two determinants
c. multiplication of two determinants
d. division of two determinants
Q. A square matrix A such that A2 = A is called
a. orthogonal matrix
b. skew symmetric matrix
c. idempotent matrix
d. singular matrix
Q. If A& B are symmetric matrix, then AB – BA is
a. symmetric
b. skew symmetric matrix
c. idempotent matrix
d. orthogonal matrix
Q. The transpose of the cofactor matrix is called
a. adjoint of the matrix
b. power of a matrix
c. minor of the matrix
d. rank of a matrix
Q. For any square matrix A of order ‘n’, A(Adj A) is equal to
a. (adj a)a
b. determinant a
c. rank of a
d. both a & b
Q. Relation between two numbers or variables are called
a. function
b. binary relation
c. inverse relation
d. none of the above
Q. If B is a subset of A , then A is a -------- of B
a. super set
b. sub set
c. empty set
d. universal set