Question # 1

If matrix A is matrix of order n x m and B is another matrix of order m x n, then BA will be the matrix of order.

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n x m

m x n

n x n

m x m

A positive definite Hessian fulfills the second order conditions for

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Maximum

Minimum

Both maximum and minimum

Mini max

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 A = A ' is called a

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Symmetric matrix

Skew symmetric matrix

Singular matrix

Rank of a matrix

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

a x2 + bx + c = 0

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Linear equation

Quadratic equation

Polynomial of degree five

None of these

(A+B) + C =a +(B+C) This law of matrices is known as.

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Cumulative law

Associative law

Distributive law

Identity law

A set continuing no elements is called.

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Null set

mpty set

void set

all of the above

The value of the dependent variable where the graph cuts the y-axis is called.

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X - intercept

Y- intercept

Slope

None of these

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

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Columns

Rows

Elements

Diagonal

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

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Always true

sometimes true

Never true

True subject to some conditions

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

If each 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

None of these

A inverse is defined only if A is a

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Square matrix

Column vector

Orthogonal matrix

Skew symmetric matrix

The objects constituting a set are called

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Estimates

Elements

Set object

Noe of these

The equilibrium price and quantity , given the inverse demand and supply functions.

po = 3q +30 and p s = 2q -5

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p = 9 and q = 7

p = 10 and q = 7

p = 9 and q = 8

p = 7 and q = 9

A polynomial equation with degree two a called.

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Linear equation

Quadratic equation

Parabola equation

All of the above

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

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Union set

Intersection set

Universal set

Unit set

If every element of a set B is also an elements of A then

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A is a subset of B

B is a subset of A

A is not a subset of B

B is not a subset of A

The determinant of quadratic form is called.

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Jacobian determinant

Hessian determinant

Discriminant

None of these

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

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