What is the common ratio of this geometric sequence 1.1, 4.4, 17.6, 70.4,...?

2 Answers
P dilip_k
Apr 23, 2016

4

Explanation:

since
4=4.4/1.2=17.6/4.4=70.4/17.6=---4=4.41.2=17.64.4=70.417.6=−−−

Jim G.
Apr 23, 2016

r = 4

Explanation:

For the standard geometric sequence:

a,ar,ar^2,ar^3, ........ , ar^(n-1)

where a represents the 1st term , r the common ratio.

r = (ar)/a=(ar^2)/(ar) =........ (ar^n)/(ar^(n-1))

For the sequence here , therefore

r = 4.4/1.1 = 17.6/4.4 = 4

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