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 Author Comment/Response proxy101 07/31/05 01:47am I have a problem using Mathematica with Lagrange Multipliers, basically the problem is to find the largest and smallest values of f(x+y)=x^3+y^3 which lie on the curve 3x^3+4xy+y^4=7... So currently What I have done is the following: f[x_, y_] := x^3 + y^3 g[x_, y_] := 3*x^3 + 4*x*y + y^4 -7 gradf[x, y] = {∂\_x\ f[x, y], ∂\_y f[x, y]} N[Solve[{gradf[x, y] = λ*gradg[x, y], g[x, y] = 0}, {x, y, λ}]] But I keep on getting: Solve::elist: List encountered during logical... What should I do to fix it? I want to find the critical points and then from there final max and min values.... URL: ,

 Subject (listing for 'Having difficulties with Lagrange Multipliers') Author Date Posted Having difficulties with Lagrange Multipliers proxy101 07/31/05 01:47am Re: Having difficulties with Lagrange Multipliers yehuda ben-s... 07/31/05 5:44pm Re: Having difficulties with Lagrange Multipliers Daniele Lupo 08/01/05 06:23am Re: Having difficulties with Lagrange Multipliers Alek 08/01/05 10:26pm
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