NRoots

可用

Numerical roots of a polynomial equation

形式

NRoots[lhs == rhs, var]

验证过的示例NRoots[1 + 2x + 3x ^ 2 + 4x ^ 3 == 0, x] → x == -0.605829586188268 || x == -0.07208520690586599 - 0.6383267351483765*I || x == -0.07208520690586599 + 0.6383267351483765*I NRoots[x ^ 3 - x ^ 2 - x - 1 == 0, x] → x == -0.4196433776070806 - 0.6062907292071994*I || x == -0.4196433776070806 + 0.6062907292071994*I || x == 1.8392867552141612 NRoots[x ^ 3 - 5x ^ 2 + 6x - 1 == 0, x] → x == 0.19806226419516174 || x == 1.5549581320873713 || x == 3.246979603717467选项

MaxIterations — default Automatic
Method — default Automatic
PrecisionGoal — default Automatic
StepMonitor — default None

在 Qurak 上运行搜索参考

主题

Polynomial Equations - Numerical Approximations

相关

NSolve Roots Solve FindRoot RootIntervals

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