User Portlet User Portlet

Discussions
I use mathematica 8. This program has a command 'InterpolatingPolynomial'. We use this command to find the unique n-degree polynomial passing through given n+1 points. For example InterpolatingPolynomial[{{-1, 4}, {0, 2}, {1, 6}}, x] ...
I am using Mathematica 8.0.1. I learned Mathematica by myself, and till yesterday I didn't need any feature of Mathematica that is related with precision. But today I have to calculate some complicated formula... and the result should be quite...