Solve with integrating an implicit function

06212014, 05:36 AM
Post: #4




RE: Solve with integrating an implicit function
1/ nSolve was added in Xcas for TI compatibility, but the native command is fsolve, nSolve differs from fsolve in one important aspect: it does not autoquote argument, which is here important.
2/ I don't know why romberg works better than Gaussian quadratures... Perhaps this is again an evaluation problem 3/ Sign are indeed not opposite, I should have said check g(.7)1/3 and g(1)1/3, your definition of g is also correct. 4/ This is an evaluation problem, in algebraic notation you do not have enough control to make sure that the initial function f(x) will only be called with a numeric value for x. This can perhaps be improved by returning fsolve of the initial arguments. 

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