Numeric root finder.
Berbeza daripada rujukan .wl: `FindRoot` options and damping schedule
Boleh disemak secara bebas: jawapan untuk fungsi ini diterbitkan semula melalui laluan lain dan dibandingkan - ruang kerja dan alat verify melakukannya secara automatik, jadi jawapan salah dikesan dan bukannya dipercayai. Sejarah →
Bentuk FindRoot[f, {x, x0}]
FindRoot[lhs == rhs, {x, x0}]
FindRoot[{f1, f2, …}, {{x, x0}, {y, y0}, …}]
FindRoot[{eqn1, eqn2, …}, {{x, x0}, {y, y0}, …}]
Contoh disahkan FindRoot[Cos[x] == x, {x, 1}]
→ {x -> 0.7390851332151607} FindRoot[Exp[x] - 1000, {x, 1}]
→ {x -> 6.907755278982137} FindRoot[x^2 - 2, {x, 1}, MaxIterations -> 2]
→
FindRoot::cvmit: Failed to converge to the requested accuracy or precision within 2 iterations.
{x -> 1.4166666666666667} FindRoot[x^2 - 2, {x, 1}, MaxIterations -> 3]
→
FindRoot::cvmit: Failed to converge to the requested accuracy or precision within 3 iterations.
{x -> 1.4142156862745099} FindRoot[x^2 - 2, {x, 1}, MaxIterations -> 0]
→
FindRoot::ioppfa: The value of the option MaxIterations -> 0 should be a positive integer, Infinity or Automatic\. (regex)
.* (regex*)
FindRoot[x^2 - 2, {x, 1}, MaxIterations -> 0] FindRoot[x^2 + 1, {x, 1}]
→
FindRoot::jsing: Encountered a singular Jacobian at the point {x} = {0.}. Try perturbing the initial point(s).
{x -> 0.} FindRoot[Max[x, 2 x] - 6, {x, 1}]
→ {x -> 3.} Pilihan AccuracyGoal — default Automatic EvaluationMonitor — default None Jacobian — default Automatic MaxIterations — default 100 PrecisionGoal — default Automatic StepMonitor — default None WorkingPrecision — default MachinePrecision