A sequence is geometric if each term is found by mutiplying the previous term by a certain number (known as the common ratio).
2,4,8,16, --> here the common ratio is 2.
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This is a geometric sequence since there is a common ratio between each term. In this case, multiplying the previous term in the sequence by 10.
No.
a sequence of shifted geometric numbers
A descending geometric sequence is a sequence in which the ratio between successive terms is a positive constant which is less than 1.
No.