Mathematics For Economic Analysis Set 4
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This set of Mathematics for Economic Analysis Multiple Choice Questions & Answers (MCQs) focuses on Mathematics For Economic Analysis Set 4
Q1 | If matrix A is comfortable for multiplication the (AB)T is equal to
- (ba)t
- btat
- atbt
- at+bt
Q2 | 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
- ia
- i
- both (a) & (b)
Q3 | The signed minor of the matrix A is called
- adjoint
- co-factor
- minor
- rank
Q4 | The determinant of a matrix and that of its transpose are
- equal
- zero
- one
- negatively related
Q5 | If two rows or columns of a determinant A are identical, then the value of the determinant is School of Distance Education Mathematics for Economic Analysis (II Semester) Page 12
- equal
- zero
- one
- negatively related
Q6 | If every element of a raw or column of a square matrix A is zero, then the value of the determinant is
- equal
- one
- zero
- not equal
Q7 | If each element of a raw or column is a sum of two elements, the determinant can be expressed as the
- sum of two determinants
- difference of two determinants
- multiplication of two determinants
- division of two determinants
Q8 | A square matrix A such that A2 = A is called
- orthogonal matrix
- skew symmetric matrix
- idempotent matrix
- singular matrix
Q9 | If A& B are symmetric matrix, then AB – BA is
- symmetric
- skew symmetric matrix
- idempotent matrix
- orthogonal matrix
Q10 | The transpose of the cofactor matrix is called
- adjoint of the matrix
- power of a matrix
- minor of the matrix
- rank of a matrix
Q11 | For any square matrix A of order ‘n’, A(Adj A) is equal to
- (adj a)a
- determinant a
- rank of a
- both a & b
Q12 | If AΠ B = Ø , then A and B are called
- disjoint set
- complement set
- unit set
- empty et
Q13 | Matrix multiplication does not satisfy --------- law
- associative
- distributive
- commutative
- none of the above
Q14 | Y= a0+a1X is a function
- nonlinear
- proportional
- polynomial
- linear
Q15 | Relation between two numbers or variables are called
- function
- binary relation
- inverse relation
- none of the above
Q16 | If B is a subset of A , then A is a -------- of B
- super set
- sub set
- empty set
- universal set
Q17 | the elements in the horizontal line in a matrix is called
- columns
- rows
- elements
- diagonal
Q18 | If matrix A is of mxn dimension, then At will be --------- dimension
- nxm
- mxn
- nxp
- mxm
Q19 | If A=At , then A is
- symmetric matrix
- skew symmetric matrix
- identity matrix
- orthogonal matrix
Q20 | Given S1={a,b,c}S2={a,1,2}, then (S1-S2) Π (S2-S1) is
- 1
- a
- b
- null set
Q21 | The set of “stars in the sky” is an example of
- countable set
- infinite set
- finite set
- unit set
Q22 | Ordered pairs of two sets are called
- elements
- function
- cartesian product
- none of the above
Q23 | AB=BA=I, then B is said to be -------- matrix of A
- adjoint
- inverse
- determinant
- cofactor
Q24 | Determinant of triangular matrix is the product of
- diagonal elements
- off-diagonal elements
- rows
- columns
Q25 | If IAI=24. then the determinant of its transpose is
- 48
- 0
- 24
- 42