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anonymous
 4 years ago
Is the sequence geometric? 2, 6, 18, 54,...
A. yes
B. no
anonymous
 4 years ago
Is the sequence geometric? 2, 6, 18, 54,... A. yes B. no

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amistre64
 4 years ago
Best ResponseYou've already chosen the best response.0if 6/2 = 54/18 then yes

Mertsj
 4 years ago
Best ResponseYou've already chosen the best response.2You always multiply by 3 to get the next term

anonymous
 4 years ago
Best ResponseYou've already chosen the best response.0Okay thanks! I am writing that in my notebook so I do not forget that! :)

amistre64
 4 years ago
Best ResponseYou've already chosen the best response.0the multiply by 3 part, or the dividing last terms part?

amistre64
 4 years ago
Best ResponseYou've already chosen the best response.0given a sequence\[a_1,a_2,a_3,a_4,...a_n,a_{n+1}\]we can determine if its geometric by taking the ratio any 2 terms that are next to each other.\[\frac{a_2}{a_1}=\frac{a_7}{a_6}=\frac{a_{n+1}}{a_n}\]

amistre64
 4 years ago
Best ResponseYou've already chosen the best response.0of course it should equal if you go the other way to\[\frac{a_1}{a_2}=\frac{a_n}{a_{n+1}}\]but it just wont be the correct ratio
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