PPSC Economics Topic 13 MCQS Test Preparation

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MCQ's Test For PPSC Economics Topic 13 Mathematics in Economics

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PPSC Economics Topic 13 Mathematics in Economics

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Question # 1

A linear function of the form 6x2 - 2y + 8 = 0 is known as.

Question # 2

(A+B) = (B+A) this law of matrices is known as.

Question # 3

A determinant composed of all the first order partial derivatives of a system of equations, arranged in ordered sequence is called.

Question # 4

A set continuing no elements is called.

Question # 5

The elements in the Horizontal line in a matrix is called.

Question # 6

A square matrix a of order 'n' is called a diagonal matrix if its non diagonal elements are.

Question # 7

Union of A and the universal set is

Question # 8

a x2 + bx + c = 0

Question # 9

For any square matrix A of order 'n' a +A is.

Question # 10

"Null set is proper subset of all the non nul sets" this statement is.

Question # 11

If the columns of a given matrix A and B are changed into rows and vice versa, the matrix thus obtained is called the.

Question # 12

A diagonal matrix whose diagonal elements are equal is called.

Question # 13

Who is regarded as the founder of theory of sets.

Question # 14

If the determinant formed by the elements of the matrix A is equal to zero, then the matrix is.

Question # 15

The slope of a horizontal line is.

Question # 16

The determinant of quadratic form is called.

Question # 17

A variable which is free to take any value we choose to assign to it is called.

Question # 18

any number raise to the power zero is always equal to.

Question # 19

If the determinant formed by the elements of the matrix is not equal to zero, then the matrix is called.

Question # 20

A function where a variable x can only very in jumps, is often called.

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Sr.# Question Answer
1 Collection of well defined distinct objects thought of as a whole is called
A. Union
B. Derivative
C. Set
D. Integral
2 if A = A , then A is
A. Symmetric matrix
B. Skew symmetric matrix
C. Identity matrix
D. Orthogonal matrix
3 If a consumer's budget constraint is given as P, X,+ Py Y = B thent he absolute slope of the budget line is.
A. B
B. x/y
C. P/Py
D. None of these
4 AB = BA = 1 , then B is said to
A. Ad joint of matrix of A
B. Inverse matrix of A
C. Determinant of A
D. Cofactor of a
5 The associative law of union is
A. AU (BUC= (AUB)
B. U C
C. AUB = BUA
D. BUC = BUA
6 A mathematical statement setting two algebraic expressions equal to each other is called.
A. Equations
B. Hypothesis
C. Inequality
D. All of above
7 If B is a subset of A ,then A is a
A. Super set of B
B. Sub set of B
C. Empty set of B
D. Universal set of B
8 If the determinant formed by the elements of the matrix is not equal to zero, then the matrix is called.
A. Skew symmetric
B. Symmetric
C. Singular
D. Non -singular
9 If every element of a raw of column of a square matrix A is zero, then the value of the determinant. is.
A. Equal
B. One
C. zero
D. Not equal
10 Union of A and a null set is equal is.
A. Intersection of A and null set
B. Null set
C. Both a and b
D. A
11 If A and B are symmetric matrices, then A +B is
A. Symmetric
B. Non symmetric
C. Skew symmetric
D. Non skew symmetric
12 The set of all elements belonging to A but not to B is.
A. B - A
B. A - B
C. A'
D. B'
13 An equation in which all variables are raised to the first power is known as.
A. Linear equation
B. Non linear equation
C. Quadratic equation
D. Polynomial of degree two
14 A diagonal matrix whose diagonal elements are equal is called.
A. Unit matrix
B. Singular matrix
C. Scalar matrix
D. Non singular matrix
15 The signed minor of the matrass A is called.
A. Adjoin
B. Co factor
C. Minor
D. Rank
16 The value of the dependent variable where the graph cuts the y-axis is called.
A. X - intercept
B. Y- intercept
C. Slope
D. None of these
17 A square matrix a such that A2 = a is called.
A. Orthogonal matrix
B. Skew symmetric matrix
C. Idempotent matrix
D. Singular matrix
18 A set containing only one element is termed as
A. Unit set
B. Singleton set
C. Both a and b
D. None of these
19 A negative definite Hessian fulfills the second order conditions for.
A. Maximum
B. Minimum
C. both maximum and minimum
D. Mini max
20 The slope of a horizontal line is.
A. One
B. Zero
C. Three
D. two

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