SOLUTION: Someone please help me with this, been at this worksheet for hours and need it done ASAP Identify the sequence (If it does not fit any of the 4 sequences, give reasons behind

Algebra ->  Sequences-and-series -> SOLUTION: Someone please help me with this, been at this worksheet for hours and need it done ASAP Identify the sequence (If it does not fit any of the 4 sequences, give reasons behind       Log On


   



Question 1116967: Someone please help me with this, been at this worksheet for hours and need it done ASAP

Identify the sequence (If it does not fit any of the 4 sequences, give reasons behind why it doesn’t work)
13,21,34,55,89,144 ...
4,-2,-8,-14 ...
2,10,15,22 ...
3,18,108,648 ...
169,196,225,256 ...

Answer by stanbon(75887) About Me  (Show Source):
You can put this solution on YOUR website!
Identify the sequence (If it does not fit any of the 4 sequences, give reasons behind why it doesn’t work)
You only need to check for common difference and common ratio.
13,21,34,55,89,144 ...
Common diff ? 21-13 = 8 but 34-21 = 13 so no common diff.
Common ratio ? 21/13 = 1.615.. and 32/21 = 1.523
So not arithmetic and not geometric
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So the same for the following streams of numbers.
Cheers,
Stan H.
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4,-2,-8,-14 ...
2,10,15,22 ...
3,18,108,648 ...
169,196,225,256 ...