Question # 1

A sequence of numbers whose reciprocal form an arithmetic sequence, is known as:

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arithmetic sequence

geometricsequence

harmonicsequence

none of these

A sequence is denoted by:

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{a_n}

a_n

a₁ + (n-1) d

In an A.P.a₃ = 12 and a₇ = 32 then d = :

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5

3

7

9

A function whose domain is the set of natural numbers is called the:

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series

sequence

means

convergent

What is the next term in the sequence 10, 7, 4, 1...........?

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2

-2

-3

none of these

The reciprocal of the terms of A.P. form:

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A.P

G.P

H.P

none of these

G.M between -2i and 8i is:

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4 or -4

4i or -4i

2 or -2

none

The product of three G.Ms between 1 and 16 is:

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32

64

128

16

7th term of G.P 3, 6, 12 ..... is:

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512

192

48

96

Two A.Ms. between 3 and 9 are:

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3. 6

5, 7

6, 12

3, 9

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

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-10

10

7

5

The series 3 + 33 + 333 + ...... is:

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A.P

G.P

H.P

none of these

An infinite sequence has no:

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nth term

last term

sum

none

The sum of 10 A.Ms between 3 and 47 is:

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50

250

100

500

A.M between x - 3 & x + 5 is __________:

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x + 1

x - 1

2x + 2

none

Sum of integral multiples of there between 4 and 22 is:

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81

75

211

none

Which number cannot be a term of a geometric sequence ?

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0

1

-1

r

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

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1 + x²

1 + x

2

none

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

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2n-1

2n+1

2n+3

none

If there are six G.Ms between 3 and 284 then G₄ =

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24

48

12

6

Arithmetic series is only possible if:

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|d| = 1

|d| < 1

|d| > 1

none

What is the general term of the sequence 2, 4, 6, 8, ........... ?

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2n

n + 1

2n²

none of these

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