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Mathematics
Mathematics
Problem
The first three terms of a sequence are
5
,
10
x
,
20
x
2
5,\;10x,\;20x^{2}
5
,
10
x
,
20
x
2
. For the sequence to be a geometric progression with common ratio
2
2
2
, the value of
x
x
x
must be a)
1
4
\dfrac{1}{4}
4
1
b)
2
2
2
c)
1
1
1
d)
−
1
-1
−
1
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