solve non-linear optimization problem

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how to maximize this nonlinear function z and find the value of x and y,
z= 0.031 {0.009[exp⁡(x-z)-1]+x/1.14}-(-1+√(1+y^4/x))/y
10<=x<=20 and y>=0

Accepted Answer

Matt J
Matt J on 26 Apr 2021
With fmincon, if you have Optimization Toolbox.
  19 Comments
Walter Roberson
Walter Roberson on 28 Apr 2021
w=10^-15*exp(-2.897*10^22*25^-1);
You badly need to rescale !!
exp(-1158800000000000000000) is about
Effectively your w is 0.
Hayam Wahdan
Hayam Wahdan on 28 Apr 2021
Thank you very much, I will rescale it

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