# Find the next three terms of the sequence 1,-1,1,-1

2
by alleahglory

2016-03-24T10:59:13+08:00
Its 1, -1, 1  (hope I guessed it right)
Thank u so much for answering but may I know what are the processes?
just look into the given sequence since its justnan alternate of 1 and -1 so it follows that the next terms will be also an alternate of 1 and -1
Oh ok.. Thanks
youre
you're welcome
• Brainly User
2016-03-24T21:25:23+08:00
Geometric sequence.

First find the common ration,  then multiply the last given number by the common ratio.

To get the common ration, divide the second sequence by the first, then the third by the second, then the fourth by the third.

-1/1 = -1 (divide second sequence by the first)

1/-1 = -1  (divide third sequence by the second)

-1/1 = -1  (divide fourth sequence by the third)

The common ratio is -1.

Multiply the last given sequence by the common ratio -1 to get the next sequence.

(-1) x (-1) = 1

The fifth sequence is 1.

To use the geometric sequence formula:

where:
n = 5 (the fifth sequence)
a₁ = 1  (first sequence)
r = -1 (common ratio)

Tnx MomGie, my answer is just a guess, i didnt use any mathematical process, we havent taken that yet in school. tnx a lot. I 'ka nga "Now I know"
Hi, jannajoyd. Your answer is an intelligent guess, and it's acceptable. I included the rule fo a more complex sequence. :-)