Question # 1

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

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BA

A²

AB

B²

The distance of the point (-2,3) from x-axis is

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-2

2

3

1

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Power set of difference set N-W is

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Empty set

Infinite set

Singleton set

{0,∅}

Decimal part of irrational number is

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Terminating

Repeating only

Neither repeating nor terminating

Repeating and terminating

The distance of the plane 2x - 3y + 6z + 14 = 0 from the origin is

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14

2

-2

11

3x + 4 > 0 is

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equation

inequality

identity

none of these

The towers each 120 meters high are 800 meters apart. The measure of the angle of elevation from the base of one tower to the top of the other is

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12^𝜊

9^𝜊

7^𝜊

-120^𝜊

If x, y, z are the pth, qth, rth terms of an A.P. and also of G.P., then x^y-z. y^z-x. z^x-yeqals

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xyz

0

1

None of these

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If n is any positive integer ,t hen 2+4+6+......+2 n=

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2ⁿ-1

2ⁿ+1

n²+1

n(n+1)

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The solution set of sin x + cos x = 0 is

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The equation x²+ y²= 0 represents

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A circle

A degenerate circle

An empty set

A st. line

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1 + tan²x + c

tan x + c

-tan x + c

cot x + c

The general equation of circle x³ + y³ + 2gx + 2fy + c = 0 , contains:

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Three independent variables

Two independent conntants

Three indepentent parameters

Three independent constants

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1, 2, 3

1, 5, 9

2, 5, 8

3, 6, 9

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The exact value of cos^-1 (-1) + cos^-1(1) =

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π

-π

π/2

π/3

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(x-1) is a factor of

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2x³-3x²+9

2x³-5x-8

48x^2-46x-9

x⁹-1

Each complex cube root of unity is square of

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itself

1

-1

the other

The square root of every incomplete square is an

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Rational numbers

Even numbers

odd numbers

Irrational numbers

An open sentence formed by using the sign of equality "=" is called

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Equation

In equation

True sentence

False sentence

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The domain of the principle cos function is

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Right angled

Obtuse angled

Isosceles

Equilateral

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are real no

both are not real

are imaginary no

both are imaginary

Distance between A(3, 8), B(5, 6) is

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If y is an image of x under the function f, then we write

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y = f(x)

x = f(y)

y = x

none of these

The magnitude of vector a 2i-7j is

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√23

√43

3

√53

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