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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quad I

quad. II

quad. III

quad. IV

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The roots of the equation 25x² - 30x + 9 = 0 are;

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rational

irrational

equal

complex

If a_n-3 = 2n - 5 then a_n =

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2n-1

2n+1

2n+3

none

r₂ =

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If set A = {1, 2, 3} and B = {1, 2, 3} then sets A and B are:

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not equal

equal

disjoint

overlapping

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2

-2

5

-5

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x = 0, y = 0

cos^-1 (-x) =

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π + cos^-1 x

π - cos^-1x

π + sin^-1x

π - sin^-1x

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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

S = {1, -1, 2, -2} is a group under:

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multiplication

subtraction

addition

none of these

If ⁿP₂ = 30 then n = :

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5

6

2

3

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If S is the H.M between 2 and b then b = :

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-10

10

7

5

In a simultaneous throw of two dice, The probability of getting sum 3 or 11 is:

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none

π, e are:

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integers

natural numbers

rationalnumbers

irrationalnumbers

The area of a sector of a circular region of radius r with length of the arc of the sector equal to s is-----------:

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rΘ

rs

In binomial expansion (a+b)ⁿ, n is positive integer the sum of coefficients equals:

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none of these

No. of signals made by 4 flags of different colors using 2 flags at a time:

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6

12

60

none

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