Question

What are the next three terms of the following sequence?
-2, 4, -8, 16,…

Answer 1

Hello there! Do you understand sequences at all or are you completely lost?

Answer 2

First we need to figure out if this is a geometric sequence or arithmetic sequence.

To see if it's a geometric sequence, take the preceding number and divide it by the previous number.

4/-2

-8/4

16/-8

since we're able to divide these terms and get a common ratio, we know it's a geometric sequence.

Answer 3

Well, this is a geometric sequence. :) Which basically means there is a common ratio between each set of 2 numbers, and each ratio is the same.

Answer 4

Well hello there! I didn't notice you were typing; I was alone at first! :)

Answer 5

Compared to a geometric sequence, if we are able to add or subtract a common term to get to the next term in the sequence we know that the common term is a difference between terms. But that's for arithmetic sequences.

Answer 6

Haha no worries, just giving input!

Answer 7

hey, you're doing pretty good. :) I think you've got this one. ;)

Answer 8

Lol you too!

Answer 9

Too bad the asker vanished :(

Answer 10

True, huh? Well uh... :3 maybe later then. :)

Answer 11

mmhmm :)

Answer 12

impressive display pic, Jhannybean