Question # 1

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

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2n

n + 1

2n²

none of these

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

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5

3

7

9

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

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-10

10

7

5

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

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50

250

100

500

Fifth term of the sequence 2, 6, 11, 17.

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24

41

32

What is called the difference between two consecutive terms of an arithmetic sequence ?

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common ratio

common difference

common element

none of these

A sequence is denoted by:

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{a_n}

a_n

a₁ + (n-1) d

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

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x + 1

x - 1

2x + 2

none

What is called the arrangement of numbers formed according to some definite rule ?

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arithmetic sequence

geometricsequence

sequence

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

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

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2n-1

2n+1

2n+3

none

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

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series

sequence

means

convergent

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

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24

48

12

6

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

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512

192

48

96

A geometric series is convergent only if:

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| r | > 1

| r | < 1

| r | = 1

none of these

Arithmetic series is only possible if:

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|d| = 1

|d| < 1

|d| > 1

none

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

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4 or -4

4i or -4i

2 or -2

none

If a_n-1 = 2n - 3 then a_n+1 =

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2n - 1

2n + 1

2n + 3

none

Which number cannot be a term of a geometric sequence ?

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0

1

-1

r

The next term of the sequence 1, 6, 20, 56, ........ is:

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112

144

212

none

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