Rule for a SequenceDate: 8/25/96 at 14:4:55 From: Anonymous Subject: Rule for a Sequence I need to find out the next number in these two sequences: 8 13 5 15 20 12 and 20 25 17 51 56 48 They both follow the same rule, but I've had trouble finding it. Could you please help? Michelle Date: 8/25/96 at 14:57:28 From: Doctor Robert Subject: Re: Rule for a Sequence It seems to me that the following algorithm gives you the correct terms in your sequence, starting with the first term in each: add five subtract eight multiply by three You keep on repeating these three steps. Am I correct? The next term in the top sequence would be 36. The next term in the lower sequence would be 144. -Doctor Robert, The Math Forum Check out our web site! http://mathforum.org/dr.math/ |
Search the Dr. Math Library: |
[Privacy Policy] [Terms of Use]
Ask Dr. Math^{TM}
© 1994- The Math Forum at NCTM. All rights reserved.
http://mathforum.org/dr.math/