How do you find the common ratio for $2,-6,18,-54,162,...$ ?

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Answer 1 · 2016-07-22T10:38:35

Common ratio $=-3$ .

Let the seq. be $t_1,t_2,t_3,t_4,t_5,..................$

Then, common ratio $=t_2/t_1=-6/2=-3; t_3/t_2=18/-6=-3$

In general, common ratio $=t_(n+1)/t_n, where, n in NN$ .

How do you find the common ratio for 2,-6,18,-54,162,...2,-6,18,-54,162,...?