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-2, 12, -72...Find the common ratio of the geometric sequence.

1 Answer

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ANSWER


r=-6

Step-by-step explanation

We want to find the common ratio of the geometric sequence.


-2,12,-72

To do this, divide a term by its preceeding term.

Let us divide 12 by -2 and -72 by 12:

That is:


\begin{gathered} \Rightarrow r=(12)/(-2) \\ r=-6 \\ \Rightarrow r=(-72)/(12) \\ r=-6 \end{gathered}

The common ratio is 6.

User Gleber
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