SOLUTION: Please help me on this question "this sequence follows a times -1 pattern: 6,-6,6,-6,... write a formula for the nth term of the sequence" sorry if this is a waste of time, but thi

Algebra ->  Sequences-and-series -> SOLUTION: Please help me on this question "this sequence follows a times -1 pattern: 6,-6,6,-6,... write a formula for the nth term of the sequence" sorry if this is a waste of time, but thi      Log On


   

Question 821346: Please help me on this question "this sequence follows a times -1 pattern: 6,-6,6,-6,... write a formula for the nth term of the sequence" sorry if this is a waste of time, but this is my first time with sequencing it would help a lot.
Answer by ewatrrr(24785) About Me  (Show Source):
You can put this solution on YOUR website!
 

Hi,

{6,-6,6,-6,...}

Geometric sequence

 +a%5Bn%5D+=+a%5B1%5Dr%5E%28n+-+1%29

Yes! r = (-1)

+a%5Bn%5D+=+a%5B1%5D%28-1%29%5E%28n+-+1%29

Note:

+a%5B4%5D+=+6%28-1%29%5E%283%29+=+-6