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10,20,40, 80 is an example of

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Arithmetic series

geometric series

arithmetic sequence

geometric sequence

answer is D.

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Detailed Solution

10,20,40,80 is an example of a Geometric Sequence with the common ratio 2.
In a geometric sequence, the ratio of the succeeding term to the preceding term is always equal.

An example of a Geometric sequence is

3 × 3 = 9,

9 × 3 =27,

27 × 3 =81, here the common ratio is 3.

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