Unable to find functional inverse of power function

1 次查看（过去 30 天）
Jun Liang
Jun Liang 2022-3-8
评论： Jun Liang 2022-3-10
for example, I have a function , and the inverse function of x is : or it can be written to
But when I use MATLAB, it throws a warning: Unable to find functional inverse.
code:
syms x theta
f = x^theta;
g = finverse(f, x);

请先登录，再回答此问题。

采纳的回答

David Hill
David Hill 2022-3-8
There is an inverse for some theta's but most theta's will produce imaginary results for negative values of x.
syms x
f=x.^3;
g = finverse(f);%this works but other values of theta will not previde a pure inverse function
  1 个评论
Jun Liang
Jun Liang 2022-3-10
thanks, Does this mean that finverse is invalid when imaginary values may appear in the function?

请先登录，再进行评论。

更多回答（0 个）

类别

在 Help Center 和 File Exchange 中查找有关 Formula Manipulation and Simplification 的更多信息

标签

产品


版本

R2017b

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!

Translated by