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solve, roots problem - Сообщения
I want to find the x-value of a function.
I found is the use of the SOLVE equation to develop an equation.
If anyone can help me I would appreciate it.
thank you
Файл не найден.Файл не найден.
I found is the use of the SOLVE equation to develop an equation.
If anyone can help me I would appreciate it.
thank you
Файл не найден.Файл не найден.
Jean's reply doesn't solve anything.
He directly gave the result.
If variables change, his sheet won't work.
This file is the real solution for your function.
Q202303131118_solved.sm (24 КиБ) скачан 165 раз(а).
Here a quick explanation for your problem.
erf() function doesn't like near all solvers.
Unknowns(f(x)) should give x as result.

But because erf(), Unknowns() gives nothing.
Thus solvers can't find a variable to start.
Except al_nleqsolve() as you can see.

You can write your own bisection algorithm too.
It will give the result, will take longer than al_nleqsolve()

Yet it works too.

Regards
He directly gave the result.
If variables change, his sheet won't work.
This file is the real solution for your function.
Q202303131118_solved.sm (24 КиБ) скачан 165 раз(а).
Here a quick explanation for your problem.
erf() function doesn't like near all solvers.
Unknowns(f(x)) should give x as result.

But because erf(), Unknowns() gives nothing.
Thus solvers can't find a variable to start.
Except al_nleqsolve() as you can see.

You can write your own bisection algorithm too.
It will give the result, will take longer than al_nleqsolve()

Yet it works too.

Regards
roots Dichotomy is Grand Doctor ... dates back Mathcad 8 Pro.
You should be able to adapt wrt other project parameters.
Offered as guide line. For +, please don't hesitate.
Cheers Jean.
Solve Dichotomy f(x)-u Forum Copy.sm (49 КиБ) скачан 149 раз(а).
You should be able to adapt wrt other project parameters.
Offered as guide line. For +, please don't hesitate.
Cheers Jean.
Solve Dichotomy f(x)-u Forum Copy.sm (49 КиБ) скачан 149 раз(а).
... added automated search point of inversion.
Cheers Jean.
Solve Dichotomy f(x)-u Forum Copy.sm (51 КиБ) скачан 160 раз(а).
Cheers Jean.
Solve Dichotomy f(x)-u Forum Copy.sm (51 КиБ) скачан 160 раз(а).
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