Determine whether the sequence is geometric.If so,find the common ratio. -3,-6,-12,-24,...
A)-3
B)-2
C) $\frac { 1 } { 2 }$
D)2
E)not geometric

Question

Quizplus · Accepted Answer

To check if a sequence is geometric or not, we need to check if there is a common ratio between any two consecutive terms. 
Let's take any two consecutive terms, say -6 and -12. 
For the sequence to be geometric, we must have -12/-6 = -2 as the common ratio. 
Similarly, if we take any other pair of consecutive terms, we'll get the same common ratio of -2. 
Hence, the sequence is geometric with a common ratio of -2, and the answer is D.

Determine Whether the Sequence Is Geometric 12\frac { 1 } { 2 }21​

Determine Whether the Sequence Is Geometric $\frac { 1 } { 2 }$