In a geometric sequence, the change from one number to the next is called the common ratio , which is the constant multiplicative factor. For example, in the sequence 2, 6, 18, 54, the common ratio is 3. This contrasts with arithmetic sequences where the change is referred to as the common difference. ;
In a geometric sequence, the change between successive terms is identified as the common ratio, which is the constant factor for multiplying each term to get the next. Among the given options, the correct choice is D. common ratio. This term contrasts with terms used in arithmetic sequences, such as common difference.
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