Question # 1

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0

1

-1

2

The roots of ax2+bx+c=0 are

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Rational ⇔ b2 -4 ac ≥ 0

Irrational ⇔ b2-4 ac > 0

Real ⇔ b2-4 ac ≠ 0

Rational⇔ b2-4 ac = 0

The ellipse and hyperbola are called

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Concentric conics

Central conics

Both a b

None

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Cos-1 (-x) =

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-x

1/x

tan-1 x

π-cos-1 x

Domain of tan x is ______

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If for the matrix A, A⁵= I, then A^-1=

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A²

A³

A

None of above

The third term of a G.P. is 4, The product of first five terms is

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43

45

46

None of these

If A and B are skew-symmetric then (AB)t is

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At Bt

AB

-AB

BA

O is ______

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A positive integer

A negative integer

A natural number

An integer

A square matrix A = [aij] is lower triangular matrix when

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aij = 0 for all i<j

bij = 0

cij = 0

dij = 0

If f(x) = x²then f(2) is

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-2

2

4

-4

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A

A'

U

None of these

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1

12

5

29

Q∪ Q' =

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Q

Q'

N

R

The exterior angle of the interior angle C of he quadrilateral whose vertices are A(5,2),B(-2,3),C(-3,-4),D(4,-5) is

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30°

60°

45°

90°

Sin 50°-sin 70°+sin 10° is equal to

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1

0

1/2

2

The set of all antiderivaties of f(= ∫f(x)dx) is the

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Definite integral

Indefinite integral

Integral

Area

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Under multiplication, solution set of is

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Groupoid

Abelian group

Semi group

All of these

In a class of 100 students, 60 drink tea, 50 drink coffee and 30 drink both. A student from his class is selected at takes at last one of 2 drinks is

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2 / 5

3 / 5

4 / 5

None of these

The roots of ax2 + bx + c = 0 are always unequal if

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b2 - 4ac = 0

b2- 4ac ≠ 0

b2- 4ac > 0

b2- 4ac ≥ 0

If P is a proposition then its negative is denoted by

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The series obtained by adding the terms of an arithmetic sequence is called the

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Infinite series

Harmonic series

Geometric series

Arithmetic series

Ifθ= 60° then

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sinθ= 1/2

tanθ= cot 30°

θ=π/4

secθ= 4

(0.90)^1/2is equal to

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0.99

0.90

0.80

0.88

If a, b, c are in AP., a, b, c are in G.P. then A, m²b, c are in

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A.P.

G.P.

H.P.

None of these

[i,j,k]

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0

2

1

-2

The A.M. of two numbers is 34 and G.M. is 16, the numbers are

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2 and 64

64 and 3

64 and 4

None of these

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