Question:

The simplest form of rectangular hyperbola is

A.

y = 1/x

B.

y = x2

C.

y = x-2

D.

y = x3

Answer» a. y = 1/x

Question:

The objects constituting a set are called

A.

estimates

B.

elements

C.

set objects

D.

none of these

Answer» a. estimates

Question:

conformity condition for matrix addition is that matrices should be

A.

square

B.

same order

C.

equal

D.

proportional

Answer» b. same order

Question:

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

A.

singular matrix

B.

non-singular matrix

C.

square matrix

D.

column vector

Answer» c. square matrix

Question:

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

A.

cumulative law

B.

associative law

C.

distributive law

D.

identity law

Answer» b. associative law

Question:

AB=BA=I, then B is said to be ——– matrix of A

A.

adjoint

B.

inverse

C.

determinant

D.

cofactor

Answer» b. inverse

Question:

The set which contains all the elements of the two given sets A and B, avoiding duplication, iscalled

A.

intersection of a and b

B.

union of a and b

C.

set of a and b

D.

none of these

Answer» b. union of a and b

Question:

If A=At , then A is

A.

symmetric matrix

B.

skew symmetric matrix

C.

identity matrix

D.

orthogonal matrix

Answer» a. symmetric matrix

Question:

A square matrix with 1’s in its principal diagonal and zeros everywhere else is

A.

diagonal matrix

B.

identity matrix

C.

leading diagonal

D.

scalar matrix

Answer» b. identity matrix

Question:

A positive definite Hessian fulfills the second-order conditions for

A.

maximum

B.

minimum

C.

both maximum and minimum

D.

minimax

Answer» b. minimum