The given sequence is geometric, with common ratio = 2.
A geometric progression, sometimes referred to as a geometric sequence in mathematics, is a series of non-zero numbers where each term following the first is obtained by multiplying the preceding one by a constant, non-zero value known as the common ratio.
Given: 10, 20, 40, ...
Here, 20/10 = 40/20 = 2
That is, the given sequence follows the required condition for a sequence to be geometric.
Hence, The given sequence is geometric, with common ratio = 2.
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