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

Question

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

mertsj · Answer

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

anonymous · Answer

ahhh thank you! :)

mertsj · Answer

yw

anonymous · Answer

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

anonymous · Answer

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

mertsj · Answer

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.

anonymous · Answer

oh okay. thank you

anonymous · Answer

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

anonymous · Answer

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

anonymous · Answer

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

anonymous · Answer

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