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Why polynomial Can't output as single Number?

• To: mathgroup at smc.vnet.net
• Subject: [mg68979] Why polynomial Can't output as single Number?
• From: "William" <sunose at gmail.com>
• Date: Sat, 26 Aug 2006 02:04:06 -0400 (EDT)
• Sender: owner-wri-mathgroup at wolfram.com

data={7,2,3,25,1,10};
f=InterpolatingPolynomial[data,x];
f/.x->5;

Result as attachment picture.

why can't get a simply number?

thanks

Please see picture:
http://lh3.google.com/sunose/RO6YrIfQABI/AAAAAAAAAHM/Mv4mNbq31mI/polynomial.JPG

thanks

• Follow-Ups:
  • Re: Why polynomial Can't output as single Number?
    • From: "Chris Chiasson" <chris@chiasson.name>