Question

Is the sequence geometric? If so, identify the common ratio.

2, –4, –16, –36, ...

yes; –2
yes; 2
yes; –3
no

Answer 1

-4/2=2
-16/-4=4 so ?

Answer 2

if \(\{a_0,a_1,a_2,....,a_{n-1},a_n,....\}\) is geometric, then \(\frac{a_1}{a_0}=\frac{a_2}{a_1}=......=\frac{a_n}{a_{n-1}}=.....\)

Answer 3

Not geometric since the common ration changes? (Sorry for replying late the site wouldn't let me get on)

Answer 4

correct