Mathematical Tools For Economics 1 Set 2

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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