Question # 1

a possible use in encomia's for the circle or the ellipse is to model.

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Production possibility curve

Demand cuve

Isocost liine

Supply curve

Union of A with B is same as union of B with A, that is AUB = BUA is termed as

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Associative law of union

Cumulative law of union

Reflective law

All the above

For any square matrix a of order 'n'a (Ad)A) is equal to.

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(Ad) A) A

Determinant A

Rank of A

Both a and b

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

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Skew symmetric

Non skew symmetric

Symmetric

Non symmetric

A polynomial equation with degree two a called.

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Linear equation

Quadratic equation

Parabola equation

All of the above

Matrix multiplication does not satisfy

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Associative law

Distributive law

Commutative law

None of the above

A matrix with all elements zero other than all the diagonals is called.

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Diagonal matrix

Orthogonal matrix

Unit matrix

Column vector

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

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Skew symmetric

Singular

Symmetric

Non singular

A set continuing no elements is called.

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Null set

mpty set

void set

all of the above

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

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Hassian determinatn

Jacobian determiant

Discrimianant

First order determinant

The set of all elements belonging to A but not to B is.

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B - A

A - B

A'

B'

A set totality of elements from all possible sets is called.

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Union set

Intersection set

Universal set

Unit set

if two sets do not have any common element, then they are called.

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Complement sets

Joint sets

Disjoint sets

None of these

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

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Dependent variable

Independent variable

Endogenous variable

Explained variable

A square matrix a such that A2 = a is called.

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Orthogonal matrix

Skew symmetric matrix

Idempotent matrix

Singular matrix

The signed minor of the matrass A is called.

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Adjoin

Co factor

Minor

Rank

if in a matrix , the number if rows is the same as the number of columns, it is called.

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Singular matrix

Non singular matrix

Square matrix

Column vector

If every element of a raw of column of a square matrix A is zero, then the value of the determinant. is.

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Equal

One

zero

Not equal

Given or known values in an equation are called.

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Constants

Parameters

Coefficients

All of the above

The determinant of quadratic form is called.

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Jacobian determinant

Hessian determinant

Discriminant

None of these

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PPSC Economics Chapter 13 Mathematics in Economics MCQs With Answers

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