Question

Determine if the sequence is arithmetic or geometric, then find the common difference or the common ratio.
27, 9, 3, 1, 1/3, ...

Answer 1

a. geomeric, common difference=1/3
b. geometric, common ratio=1/3
c. arithmetic, common ratio=1/3
d. arithmetic, common difference=1/3

Answer 2

You are dividing by 3 every time. Can you figure it out now.

Answer 3

well i know that lol but i dont know how to figure out if its a geometric or an arithmetic

Answer 4

and i dont know what a common ratio or common difference when they say that

Answer 5

ok, hang on

Answer 6

okay :)

Answer 7

http://www.purplemath.com/modules/series3.htm

I will tell you that it's geometric, can you try for the second part. The site above will help you understand.

Answer 8

The info is in the second paragraph.

Answer 9

Did you find the answer?

Answer 10

okay thanks , ill look at it

Answer 11

no prob, I get sidetracked all the time.

Answer 12

lol i was on that earlier! i didnt read the whole thing but since you looked at it too im going to look. haha yeah :)

Answer 13

ohhhh okay! now i know what they mean when its a common ratio or common difference. i got it now :)

Answer 14

OK, so just to be clear the answer is:

b. geometric, common ratio=1/3

Answer 15

hahahah yayys! thats the one i picked. thanks

Answer 16

your welcome