Problem of critical point solution.
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I have a problem with function below. The answer below means that there is only one critical point, but the graph tells me there are 5 points.
syms x y
f=(2*x^2+8*y^2-4*x)/exp(x^2+y^2-2*x-1);
gradf = jacobian(f,[x,y]);
hessmatf = jacobian(gradf,[x,y]);
[xcr,ycr]=solve(gradf(1),gradf(2));
Cannot solve symbolically. Returning a numeric approximation instead.
> In solve at 306
In criticalpoint at 5
ans =
[ -0.4142135623730950488016887242097, 0]
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Walter Roberson
2015년 11월 8일
You would get that result if you were to paste the lines of code in to the console.
Walter Roberson
2015년 11월 8일
It does appear to have given up on the solve() too easily. Which version are you using?
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