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How can I get the previous Fibonacci calculated number in a specific

• To: mathgroup at smc.vnet.net
• Subject: [mg100266] How can I get the previous Fibonacci calculated number in a specific
• From: ratulloch at gmail.com
• Date: Fri, 29 May 2009 21:01:03 -0400 (EDT)

Greetings

How can I get a previous Fibonacci calculated number in a specific
range.  I can calculate the previous number of phi see below

phi1 =(1+sqrt(5))/2

13/phi1

I tested it with 13 and got 8.034441857 .....so that works

but how can I get only the previous numbers of Fibonacci in a
specified range from 20 to 20000 if I input a large number like
234.34e10

tia sal2

• Follow-Ups:
  • RE: How can I get the previous Fibonacci calculated number in a specific
    • From: "Harvey P. Dale" <hpd1@nyu.edu>