The given sequence is geometric, with the common ratio = 2.
Given: 1, 2, 4, 8, ...
=> 2⁰, 2¹, 2², 2³, ...
We can see that the quotient of each two consecutive terms is 2, in the given sequence, following the necessary condition for a sequence to be geometric.
Thus, The given sequence is geometric, with the common ratio = 2.
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