为什么输出是disp(sol) root(z^3 - 3*z - 1, z, 1) root(z^3 - 3*z - 1, z, 2) root(z^3 - 3*z - 1, z, 3)
时间: 2024-05-30 15:12:43 浏览: 22
这个输出是因为你使用了MATLAB中的solve函数来求解方程z^3 - 3*z - 1 = 0,并将结果存储在变量sol中。然后,使用disp函数来显示sol的值,即方程的三个根。
root(z^3 - 3*z - 1, z, 1)表示方程z^3 - 3*z - 1 = 0的第一个根,root(z^3 - 3*z - 1, z, 2)表示方程的第二个根,root(z^3 - 3*z - 1, z, 3)表示方程的第三个根。
相关问题
disp(sol) root(z^3 - 3*z - 1, z, 1) root(z^3 - 3*z - 1, z, 2) root(z^3 - 3*z - 1, z, 3)
The output of the given code snippet depends on the symbolic toolbox used by MATLAB. Here is the explanation of each function call:
- `disp(sol)` prints the value of the variable `sol` to the command window. The variable `sol` is not defined in the given code snippet, so this function call will result in an error.
- `root(z^3 - 3*z - 1, z, 1)` computes the first root of the polynomial `z^3 - 3*z - 1`. The output of this function call depends on the symbolic toolbox used by MATLAB. If the toolbox is installed and loaded, the output will be a symbolic expression representing the first root of the polynomial. Otherwise, this function call will result in an error.
- `root(z^3 - 3*z - 1, z, 2)` computes the second root of the polynomial `z^3 - 3*z - 1`. Similar to the previous function call, the output of this function depends on the availability of the symbolic toolbox.
- `root(z^3 - 3*z - 1, z, 3)` computes the third root of the polynomial `z^3 - 3*z - 1`. Similar to the previous function calls, the output of this function depends on the availability of the symbolic toolbox.
disp(sol) root(z^3 - 3*z - 1, z, 1) root(z^3 - 3*z - 1, z, 2) root(z^3 - 3*z - 1, z, 3)是什么意思
这段代码使用Matlab或Octave计算了方程z^3 - 3z - 1的解,并输出了所有解及它们在z=1、z=2和z=3处的取值。其中sol表示所有解,root(z^3 - 3z - 1, z, 1)表示在z=1处的解,root(z^3 - 3z - 1, z, 2)表示在z=2处的解,root(z^3 - 3z - 1, z, 3)表示在z=3处的解。