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Jan 18, 2016 at 4:30 comment added Dehbop I meant "polynomial rational function"
Jan 17, 2016 at 8:28 comment added Stelios @Badadeeboop Thanks for the accept. Replying to your comments: (1) No constraint was imposed on any variable/parameter (I don't see why you thought so). (2, 3) The only requirement for applying the first-order necessary conditions is that the objective function is differentiable (and, of course, a rational polynomial function is). This is a fundamental theorem of differential calculus (which all numerical methods - not only Newton-Rhapson - exploit)
Jan 17, 2016 at 5:48 comment added Dehbop The only instances that one can use derivative to find a minimum (that is the root) is when using a Newton-Rhapson method or a similar algorithm.
Jan 17, 2016 at 5:43 comment added Dehbop Also, sol being a polynomial reciprocal function, I don't see the reason for taking the derivative and asking for the 0. That only gives us the negative and positive infinity, won't it?
Jan 17, 2016 at 5:37 comment added Dehbop I guess the function I've been looking for is "Thread".... Anyways, along the way, did you make the constraint that d4 is an integer? Coz I've for known solutions (there are, trust me) noticed that d4 is hardly ever an integer.
Jan 17, 2016 at 5:32 vote accept Dehbop
Jan 16, 2016 at 18:38 history answered Stelios CC BY-SA 3.0