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Byju's Answer
Standard X
Mathematics
Common Ratio
The common ra...
Question
The common ratio of the G.P series 9, 27, 81 is _____.
A
2
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B
6
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C
9
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D
3
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Solution
The correct option is
D
3
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Similar questions
Q.
The common ratio of the G.P series 9, 27, 81 is _____.
Q.
In a G.P. series consisting of positive terms, each term is equal to the sum of next two terms. Then the common ratio of this G.P. series is
Q.
Assertion :
1
,
2
,
4
,
8
,
.
.
.
.
is a G.P.,
4
,
8
,
16
,
32
is a G.P. and
1
+
4
,
2
+
8
,
4
+
16
,
8
+
32
,
.
.
.
.
is also a G.P Reason: Let general term of a G.P. with common ratio r be
T
k
+
1
and general term of another G.P. with common ratio
r
be
T
′
k
+
1
, then the series whose general term
T
"
k
+
1
=
T
′
k
+
1
+
T
k
+
1
is also a G.P. with common ratio
r
.
Q.
The
4
t
h
term of a G.P. is
16
and
7
t
h
term is
128
. Find the first term and common ratio of the series.
Q.
If the sum of three terms of G.P. is 19 and product is 216, then the common ratio of the series is
[Roorkee 1972]
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