Question # 1

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-2x³

2x^-3

-2x^-3

2x³

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

A vector with magnitude one is called

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constant vector

unit vector

zero vector

null vector

The number of the diagonals of a 6 sided figure is

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15

21

9

6

The graph of a quadratic function is

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Circle

Ellipse

Parabola

Hexagon

∀x,y,z ∈ R and z 0,then

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x > y ⇒ xz > yz

x<y ⇒ xz < yz

x < y ⇒ xz > yz

None of these

Arithmetic mean between a and b is

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sec (-360°) = ______

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0

1

2

3

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The positive value of k for which the equation x2 + kx + 64 = 0 has one of the roots 0

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4

64

8

All values of k

If a,β are the roots of ax2+bx+c=0,the equation whose roots are doubled is

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ay2 +2by+c=0

ay2+2by+4c=0

ay2+2by+c=0

ay2+by+4c=0

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sec x tan x

-cosec x cot x

sec²x

-sin x

Cos^-1 12/13 =

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tan^-1 3/5

cot^-1 13/12

Sec^-1 13/12

sin^-1 5/13

P∉ A means

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Pis subset of A

Pis an element of A

P does not belongs to A

A does not element of P

The value of sin²20° + sin²70° is equal to

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1

2

-1

1/2

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n² - 1 divisible by 8 when n is

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an odd integer

an even integer

Irrational

Prime Number

(1, 1) is the in the solution of the inequality

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3x + 4y > 3

2x + 3y < 2

4x = 3y > 5

2c - 3y > 2

Cofactor of an element aij denoted by Aij is

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(-2)i+j

Mij

(-1)i+j Mij

None of above

Tan 3x tan 2x-tan x is equal to

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Tan x tan 2x tan 3x

-tan x tan 2x tan 3x

Tan x tan 2x - tan - tan x tan 3x - tan 2x tan 3x

None of these

Period of Cotangent function is

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π

-π

0

-2π

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1 + 2 + 3 + ...... + n = ______

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The symbol of irrational is

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W

N

Q

Q'

The period of the function f(x) = sin⁴x + cos⁴x is

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π

π/2

2π

None of these

nCn-r is equal to

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n!

n-1Cr

nCr

None of these

If θ be angle between u,v and u,v determine the sides of a triangle then the third side opposite to angle θ has length

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|u+v|

|u|+|v|

|u-v|

|u|-|v|

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none of these

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