Question # 1

If the matrices A and B have the order 1 x 10 and 10 x 1 then order of AB is

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1 x 1

1 x 10

10 x 10

10 x 1

Domain of cotθis

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Matrices A = [aij] 2 x 3 and B = [bij] 3 x 2 are suitable for

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BA

A2

AB

B2

In a quadratic equation with leading co-efficient 1, a student reads the co-obtain the roots as - 15 and -4. The correct roots are

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6, 10

-6, -10

8, 8

-8, -8

if f(x) = x³ -3x² +5x -1, then f(-√2)=

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7+7√2

3+3√2

-7-7√2

-3-3√2

Range of cosθis

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5

10

20

30

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The distance between the points A(3,1) and B(-2,-4) is

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5

25

10

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The set { 1 , -1} is closed w.r.t.

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Addition

Multiplications

Subtraction

None of these

If n is any positive integer then n! > 2^n-1for

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If b²- 4ac = 0 then the roots of the equation are

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Real and distinct

Real and equal

Imaginary

None of these

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100

99

0

none of these

The sum of all positive integral multiple of 5 less than 100 is

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950

760

1230

875

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15/23

7/15

7/8

15/7

A function of the form p(x)/Q(x) is called:

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Rational function

Logarithmic function

Exponential function

Hyperbolic function

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3x + 4 > 0 is

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equation

inequality

identity

none of these

Sum of first n terms of an arithmetic series is

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0! = ______

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0

1

2

Not defined

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n!

0!

1

None of these

sin 3a = ______;

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3sin a - 4sin3a

4sin a -3 sin3 a

3 cos3 a -cosa

4cos3 a - 3cos a

The two different parts of the hyperbola are called its

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Vertices

Directrices

Nappes

Branches

If the roots of ax²+ bx + c =0 are equal in magnitude but opposite in sign, then

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a = 0

b = 0

c = 0

None of these

Group of none-singular matrices under multiplication is

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None-Abelian group

Semi group

Abelian group

None of these

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A

B

A'

None of these

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I3

rI3

r

none

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4

3

2

1

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