Question # 1

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

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24

48

12

6

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

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x + 1

x - 1

2x + 2

none

If a_n = (n + 1) a_n-1, a₁ = 1, second term of the sequence is:

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3

1

2

4

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

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

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2n

n + 1

2n²

none of these

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

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

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4 or -4

4i or -4i

2 or -2

none

Domain of finite sequence is:

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set of natural numbers

subset of N

R

none

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

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series

sequence

means

convergent

Zero cannot be a term of:

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A.P and G.P

G.P and H.P

A.P and H.P

only H.P

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

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5

3

7

9

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

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112

144

212

none

Reciprocals of the terms of the geometric sequence form:

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A.P

G.P

H.P

none

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

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-10

10

7

5

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

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112

212

144

none

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

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50

250

100

500

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

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A.P

G.P

H.P

none of these

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

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24

41

32

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

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6

-6

none of the foregoing numbers

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

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512

192

48

96

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

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2

-2

-3

none of these

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