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 1d comment How to get the exact solution $x^*=x_n-f(x_n)\frac{x^*-x_n}{f(x^*)-f(x_n)}$ from Newton's method? It is an iterative algorithm. You cannot get a closed form solution from this 1d answered Proving a Function is continuous on an interval. Apr 30 awarded Supporter Apr 30 awarded Teacher Apr 30 answered How to solve for a -b Apr 29 comment An optimisation problem Typo corrected. Thanks callculus Apr 29 revised An optimisation problem typo corrected Apr 29 asked An optimisation problem Oct 8 asked Linearizing a constraint for ILP Sep 21 awarded Tumbleweed Sep 18 awarded Commentator Sep 18 comment Seeking a 3 variable function with a specific property Yes. That is exactly what i do in the (algorithmic) solution I've in place now. "Sorting" the list of x's(x1,x2,x3....) and then processing them. I wanted to see if I can find a better "algorithm" with this formulation avoiding the sort altogether. Sorry if I sound a little cryptic here. I hope you understand my intention. Sep 18 comment Seeking a 3 variable function with a specific property I am using this in an objective function inside the summation for an NLP. The analysis becomes easier with trivial mathematical functions.Basically the "if then else" functions are more algorithm oriented Sep 18 comment Seeking a 3 variable function with a specific property Powers are considered a math operation. Sep 18 revised Seeking a 3 variable function with a specific property added 13 characters in body Sep 18 asked Seeking a 3 variable function with a specific property Sep 15 revised Formulating an Optimisation problem(LP?) added 19 characters in body; edited title Sep 14 awarded Editor Sep 14 revised Formulating an Optimisation problem(LP?) added 4 characters in body Sep 14 revised Formulating an Optimisation problem(LP?) edited tags