Question:

Given any quadratic equation a x2 + b x + c = 0, where a, b, and c are given constants, the solutions(roots) are given by the formula

A.

x =

B.

x =

C.

x =

D.

none of these

Answer» a. x =

Question:

A inverse is defined only if A is a

A.

square matrix

B.

column vector

C.

orthogonal matrix

D.

skew-symmetric matrix

Answer» a. square matrix

Question:

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

A.

associative law of union

B.

cumulative law of union

C.

reflective law

D.

all the above

Answer» b. cumulative law of union

Question:

A diagonal matrix whose diagonal elements are equal is called

A.

unit matrix

B.

singular matrix

C.

scalar matrix

D.

non-singular matrix

Answer» c. scalar matrix

Question:

Any number raise to the power zero is always equal to

A.

zero

B.

one

C.

two

D.

that number itself

Answer» b. one

Question:

If B is a subset of A, then A U B =

A.

b

B.

a

C.

intersection of a and b

D.

none of these

Answer» a. b

Question:

A linear function of the form 6x – 2y + 8= 0 is known as

A.

explicit function

B.

implicit function

C.

quadratic function

D.

all the above

Answer» b. implicit function

Question:

The functions y = 2x + 1 and x = ½ y – ½ are said to be

A.

non-linear functions

B.

inverse functions

C.

step functions

D.

all the above

Answer» b. inverse functions

Question:

Solving the simultaneous equations 8x + 4y = 12 and -2x + y = 9 gives

A.

x = -3/2 and y = 6

B.

x = 4 and y = 2

C.

x = ½ and y = ½

D.

none of these

Answer» a. x = -3/2 and y = 6

Question:

The increase in dependent variable that results when the independent variable increases by oneunit in a simple linear function is called

A.

y-intercept of the curve

B.

slope of the curve

C.

x-intercept of the curve

D.

marginal value

Answer» b. slope of the curve