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Arithmetic and Geometric Sequences
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An arrangement of numbers written in definite as per some specific rules is called
Sequence
permutation
combination
subset
24th term in Arithmetic Progression 3, 5, 7, .... is
A
52
48
47
Next term of 9, 12, 16, 21 is
27
34
30
24
In arithmetic sequence, common difference is denoted by
D
n
R
Geometric Progression between 5 and 9 is
7
±3 √5
15
√5
7th term of Geometric Progression 2, 6, 18, ... is
729
1458
2919
5832
Arithmetic mean between a and 10 is 30, value of ‘a’ should be
50
60
53
45
If a, G, b are in Geometric Progression then ‘G’ is said to be
geometric mean
None of above
standard deviation
Arithmetic Mean
Geometric Progression between −4 and −9 is
−6
±6
±8
−8
If sequence does not has a last term, then it is said to be
arithmetic sequence
None of above
infinite sequence
finite sequence
Three Geometric means between 2 and 32 are
10, 12, 14
4, 8, 16
6, 10, 14
6, 8, 10
Arithmetic mean between −4 and 12 is
5
−4
4
3
To represent a sequence, a special notation is used called
am
an
a⁄n
Arithmetic mean between x -1 and x + 7 is
x - 3
x + 4
x - 4
x + 3
In arithmetic sequence, terms are denoted by
a⁄n
am
an
If a = 4, an = 110, d = 2, then value of ‘ n’ should be
53
54
51
52
Arithmetic mean between √5 and 3√5 is
5
2√5
√5
4√5
Geometric mean is calculated by
± √ab
a - b⁄2
± ab
(a + b )²
If r = 10, an = 100, a = 1 then ‘n’ should be equal to
2
4
1
3
Three arithmetic means between 11 and 19 are
13, 15, 17
13, 14, 15
12, 14, 15
14, 15, 17
1
2
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