SOLUTION: if a[1]=4 and r=2, what are the first four terms of the geometric sequence? I think its 4, 6, 8, 10 but im not positive

Algebra ->  Sequences-and-series -> SOLUTION: if a[1]=4 and r=2, what are the first four terms of the geometric sequence? I think its 4, 6, 8, 10 but im not positive      Log On


   



Question 88693: if a[1]=4 and r=2, what are the first four terms of the geometric sequence? I think its 4, 6, 8, 10 but im not positive
Answer by Earlsdon(6294) About Me  (Show Source):
You can put this solution on YOUR website!
In a geometric sequence, a%5B1%5D+=+4 and r+=+2
The first four terms would be:
4, 8, 16, 32,...
Check:
The common ratio is given as 2 and this means that the ratio of consecutive terms a%5Bn%5D%2Fa%5Bn-1%5D+=+2.
8%2F4+=+2
16%2F8+=+2
32%2F16+=+2