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Does "fsolve" still avaliable for sloving the nonlinear equation?

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I would like to slove the nonlinear equation above and I use matlab to code below but the command window showed: Undefined function 'fsolve' for input arguments of type 'function_handle'.
How should I use the fsolve function or is there any other way to solve these nonlinear equation?
Thank you very much!
clc; clear;
f=@(x) [2.*x(1)-x(2)-exp(-x(1));-x(1)+2.*x(2)-exp(-x(2))];

Accepted Answer

Sulaymon Eshkabilov
Sulaymon Eshkabilov on 25 May 2021
In order to employ fsolve() function, you should have optimization toolbox installed in your computer.
fsolve is part of optimization toolbox and thus, you have gotten such an error message.

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