Mathematical Tools For Economics 1 Set 2
On This Page
This set of Mathematical Tools for Economics 1 Multiple Choice Questions & Answers (MCQs) focuses on Mathematical Tools For Economics 1 Set 2
Q1 | In …………………… sets, the number of elements in the two sets is equal.
- null.
- equivalent
- singleton
- zero
Q2 | The value of x in the equation 4x+3=2x+5
- 1
- 2
- -2
- 8
Q3 | The values of x satisfying the equations is given by 3x+2=x+6
- 4
- 8
- 2
- -2
Q4 | The curve of a linear equation is................
- parabola
- a liner
- hyper-parabola
- none of the above
Q5 | A linear equation in two variables is of the form ax + by + c = 0, where
- a=0, b=0
- a ≠0, b≠0
- both a and b
- none of the above
Q6 | A positive definite Hessian fulfils the second-order conditions for
- maximum
- minimum
- both maximum and minimum
- minimax
Q7 | A negative definite Hessian fulfils the second order conditions for
- maximum
- minimum
- both maximum and minimum
- minimax
Q8 | The general quadratic equation ax2 +bx +c=0 can be solved by using
- by factorization method
- by quadratic formula
- by completing the square method
- all the above
Q9 | A quadratic equation is an equation of degree
- one
- two
- three
- all of the above
Q10 | A polynomial can have:
- constants
- variables
- exponents
- all the above
Q11 | A ------------ is a relation in which each input has only one output.
- set
- function
- equation
- all the above
Q12 | When S1⊆ S, where S contains at least one element not in S1, S1 is called a ----- of S.
- power of the set
- proper subset
- equivalent set
- unit set
Q13 | A ∪ B = B∪ A and A ∩ B= B ∩ A is known as
- de morgan’s law
- distributive law
- associative law
- commutative law
Q14 | A ∪ (B∪ C) = (A ∪ B )∪C and A ∩ (B∩C)= (A ∩ B) ∩C is known as
- de morgan’s law
- distributive law
- associative law
- commutative law
Q15 | A ∪ (B ∩C) = (A ∪ B ) ∩(A∪C)A ∩ (B∪C)= (A ∩ B) ∪(A∩C) is known as
- de morgan’s law
- distributive law
- associative law
- commutative law
Q16 | (A ∪ B) ' = A' ∩ B' and (A ∩ B) '= A'∪ B' is known as
- de morgan’s law
- distributive law
- associative law
- commutative law
Q17 | set that contains everything is known as
- universal set
- proper subset
- equivalent set
- unit set
Q18 | Transpose of a rectangular matrix is a
- rectangular matrix
- diagonal matrix
- square matrix
- scalar matrix
Q19 | Transpose of a column matrix is
- zero matrix
- diagonal matrix
- column matrix
- row matrix
Q20 | Two matrices A and B are multiplied to get AB if
- both are rectangular
- both have same order
- no of columns of a is equal to columns of b
- no of rows of a is equal to no of columns of b
Q21 | In a matrix multiplication for A and B, (AB)t
- at bt
- bt at
- 1/ab
- ab
Q22 | Two matrices A and B are multiplied to get BA if
- both are rectangular
- both have same order
- no of columns of a is equal to columns of b
- both are square matrices
Q23 | What is the order of a matrix?
- number of rows x number of columns
- number of columns x number of rows
- number of rows x number of rows
- number of columns x number of columns
Q24 | Which of the following property does not hold for matrix multiplication?
- associative
- distributive
- commutative
- additive inverse