1. The problem statement, all variables and given/known data y=1/(x^1/4). I'm given 5 x's and 5y's. I need to write Newton interpolating polynomial and find the error. 2. Relevant equations Ln-1(x)=f(x1)+f(x1,x2)(x-x1)+... 3. The attempt at a solution With the formula above I wrote the Newton interpolating polynomial but I can't find the error since I don't have the formula. Can anyone help?