Root 指令
来自GeoGebra Manual
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- Root[ <Polynomial> ]
- Root[ <Function>, <Initial x-Value> ]
- Root[ <Function>, <Start x-Value>, <End x-Value> ]
- Root[ <Polynomial> ]
- Yields all roots of the polynomial as intersection points of the function graph and the x‐axis.
- Root[ <Function>, <Number a> ]
- Yields one root of the function using the initial value a for Newton's method.
- Root[ <Function>, <Number a>, <Number b> ]
- Yields one root of the function in the interval [a, b] (regula falsi).
CAS Syntax
- Root[ <Polynomial> ]
- Yields all roots of the polynomial as intersection points of the function graph and the x‐axis.
- 範例:
Root[x^3 - 3 * x^2 - 4 * x + 12]
yields {x = 3, x = 2, x = -2}.
備註:
This command is only a special variant of Solve Command.