Top 50+ Solved Mathematical Tools for Economics 1 MCQ Questions Answer
Q. If all the elements of any row or column are zero, the determinant is zero.
a. unity
b. positive
c. negative
d. zero
Q. The determinant that results when the row and column in which that element lies are deletedis called:
a. cofactor
b. minor
c. inverse
d. none
Q. An adjoint matrix is the ……………… of the cofactor matrix.
a. inverse
b. minor
c. cofactor
d. transpose
Q. If the rows and columns of a determinant are interchanged, its value will:
a. change
b. change sign
c. not change
d. become zero
Q. If a set consists of a specific number of different elements, it is called
a. infinite set
b. finite set
c. unit set
d. null set
Q. In …………………… sets, the number of elements in the two sets is equal.
a. null
b. equivalent
c. singleton
d. zero
Q. The curve of a linear equation is................
a. parabola
b. a liner
c. hyper-parabola
d. none of the above
Q. A positive definite Hessian fulfils the second-order conditions for
a. maximum
b. minimum
c. both maximum and minimum
d. minimax
Q. A negative definite Hessian fulfils the second order conditions for
a. maximum
b. minimum
c. both maximum and minimum
d. minimax
Q. The general quadratic equation ax2 +bx +c=0 can be solved by using
a. by factorization method
b. by quadratic formula
c. by completing the square method
d. all the above
Q. The set B of odd positive integers less than 10 can be expressed by _____________
a. {1, 2, 3}
b. {1, 3, 5, 7, 9}
c. {1, 2, 5, 9}
d. {1, 5, 7, 9, 11}