Question # 1

The number of divisors of 1029, 1547 and 122 are in

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A.P.

G.P.

H.P.

None of these

No term of a geometric sequence can be

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0

1

2

3

Sequence also called..............

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Series

Function

progressions

Elements

An indicated sum of terms of a sequence is represented by

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Sn

an

S(n)

{Sn}

A Geometric Series is divergent only if

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|r|>1

|r|≥1

|r|=1

None of these

The sum of an indicated number of terms in a sequence is called

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sequence

progression

Series

Mean

The difference of two consecutive terms of an A.P is called the

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Common difference

Common ratio

Geometric series

Geometric mean

A,G,H are in

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A.P

G.P

H.P

None of these

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1

2

3/2

5/2

If S_rdenotes the sum of the first r terms of a G.P., then S_n, S_2n- S_n, S_3n- S_2nare in

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A.P.

G.P.

H.P.

None of these

The formula an = a +(n-1)d for an A.P is called

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nth term of an A.P

Sum of first n terms

A,M between a and b

None of the above

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If a₁= 3, r = 2, then the nth term of the G.P. is

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2.3^n-1

3.2ⁿ

3.2ⁿ⁺¹

3.2^n-1

The 6th term of an arithmetic sequence whose first term is 3 and common difference in zero is

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18

6

3

0

If the domain of sequence is finite set then the sequence is called

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geometric sequence

infinite sequence

finite sequence

arithmetic sequence

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0

1

2

3

Arithmetic mean between x - 3 and x + 5 is

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x + 1

x + 2

x + 3

x + 4

For three consecutive terms in A.P middle term is called

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A.M

nth term

Central term

None of these

How many numbers are there between 103 and 750 which are divisible by 6

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125

107

108

113

The sum of infinite numbers of terms of an arithmetic series is

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Finite

Infinite

May or may not finite

None of these

The fifth term of an A.P. Whose first term is 5 and common difference is 3,is

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20

17

25

30

The5thand 13th terms of an A.P are 5 and-3 respectively The first term of the A.P is

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1

-15

9

2

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15/23

7/15

7/8

15/7

A Series which does not coverage to a Unique sum is called

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Harmonic Series

Oscillatroy Series

Arithmetic Series

None of these

Write the first four terms of the sequence if a_n= (-1)ⁿn²

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-1, 4, -9, 16

1, -4, 9, 16

1, 4, 9, 16

None of these

Find the geometric mean between 4 and 16

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If all members of a sequence are real numbers then it is called

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A.P

Real Sequence

G.P

None of these

If Sn is a definite number as n → ∞,then the geometric series is

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Convergent

Divergent

Oscillatroy

None of these

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A number H is said to be the H.M. between a and b if a, H, b are in

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A.P.

G. P.

H. P.

None of these

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ECAT Pre General Science Mathematics Chapter 8 Sequences and Series Online Test MCQs With Answers

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