Question

Finding next term in sequence...please help?

Answer 1

if you divide a number by the one before it, what do you get ?

Answer 2

-8 @phi

Answer 3

and if you multiply a number by -8, see if you get the next number.

Answer 4

-256 Thank you!! Would you know of how to begin this problem by the way..?

Answer 5

Recursive rule I think... each multiplied by 1/5?

Answer 6

It's the same type of problem. You can "brute force" it. you have the first four terms, so you need four more to find the eighth.

There is a formula you can use, but of course you have to memorize it, then remember how to use it.

Answer 7

here are the formulas (though you probably have them in your notes?)
http://www.regentsprep.org/Regents/math/algtrig/ATP2/GeoSeq.htm

Answer 8

@phi Yes thank you!