Question # 1

Product of a complex number and its conjugate is:

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a real number

irrationalnumber

a complexnumber

either real number or complexnumber

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If two sets have no element common, they are called:

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disjoint

over lapping

dissimilar

exhaustive

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4

16

8

64

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all of these

Number of terms in the expansion of (x+y)⁶ is:

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7

6

2

8

Sum of all three cube roots of unity is:

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1

-1

0

3

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The number of ways in which fiver persons can sit at a round table is:

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4!

5!

none of these

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scalar matrix

diagonalmatrix

triangularmatrix

none of these

The period of sin 2x is:

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π

2π

3π

What is the common difference of the sequence 11, 5, -1, ......... ?

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6

-6

none of the foregoing numbers

To draw general conclusions from a limited number of observations is called:

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logic

proposition

induction

deduction

A.M between 1 + x - x² and 1 + x + x² is:

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1 + x²

1 + x

2

none

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5

14

20

6

The graph of x = sin y is obtained by reflecting the graph of y = sin x about the line:

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x axis

y axis

y = x

y = -x

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0

-1

>1

none

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A and B are power sets

A and B are disjoint sets

A and B are super sets

A and B are equal sets

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r₁

r₂

r₃

r

The factorial of positive integer is:

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rational no.

positive integer

real no.

none

The next term of the sequence-1, 2, 12, 40, .........is:

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112

212

144

none

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