SOLUTION: Write the nth term of the following sequence in terms of the first term of the sequence. 2, -4, 8, -16, . . . I am stumped on this one. I have been working it for hours but c

Algebra ->  Sequences-and-series -> SOLUTION: Write the nth term of the following sequence in terms of the first term of the sequence. 2, -4, 8, -16, . . . I am stumped on this one. I have been working it for hours but c      Log On


   



Question 453307: Write the nth term of the following sequence in terms of the first term of the sequence.
2, -4, 8, -16, . . .
I am stumped on this one. I have been working it for hours but cannot seem to get the right formula to do it. Any help would be much appreciated. Thanks

Answer by richard1234(7193) About Me  (Show Source):
You can put this solution on YOUR website!
Sequence is geometric, with common ratio -2. So,

(note that I put a negative so that the sequence does not become -2, 4, -8, etc.).