Question

If the sequence is geometric, what is its common ratio?
-1, -6, -36, -216, …

Answer 1

Divide the second term by the first term. That is the common ratio.

Answer 2

ahhh thank you! :)

Answer 3

yw

Answer 4

what about 48, 46, 44, 42, ...

Answer 5

thats an algebraic series....what is the difference between each term ?

Answer 6

That is an arithmetic sequence so you are looking for the common difference. so subtract the first term from the second term to find the common difference.

Answer 7

oh okay. thank you

Answer 8

oops...I said algebraic....my bad

Answer 9

what about Which of the following is the formula for the geometric sequence?
1, -8, 64, -512, …

Answer 10

which one....the one to find a term or to find the sum of terms

Answer 11

this will help you...check it out
http://www.regentsprep.org/Regents/math/algtrig/ATP2/GeoSeq.htm