List questions from maxima-minima

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Find the maximum value of $2x^2 - 3xy - 2y^2$ subject to the condition that $25x^2 - 20xy + 40y^2 = 36$

Published on 12 Jun 2018 - 13:24

1.1k

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Direct proof of maximum of a function implying that the derivative is zero?

Published on 25 Mar 2026 - 12:52

45

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Calculate the maximum of $f(x,y)=\left|\frac{\sin(xy)}{x\sqrt{y}}\right|$

Published on 13 Jun 2018 - 8:39

442

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Min max optimization of convex indefinite function (2)

Published on 13 Jun 2018 - 11:10

173

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Penalty method for $f(x,y,z) = x^2 + 2y^2 + z^2$

Published on 13 Jun 2018 - 20:22

27

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How fast decrease a limit of a maximum?

Published on 14 Jun 2018 - 10:03

86

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Maximum principle application

Published on 25 Mar 2026 - 7:38

6.4k

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Maximize $f(x,y)=xy$ subject to $x^2-yx+y^2 = 1$

Published on 25 Mar 2026 - 6:04

113

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Find the minimizer of $A=12a+13b+11c$

Published on 25 Mar 2026 - 6:05

44

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Showing equivalence between two constrained maximisation problems

Published on 24 Mar 2026 - 23:41

75

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If $F_0\cap G_0=\emptyset$ then $x$ is a local minimum of function

Published on 23 Mar 2026 - 6:25

191

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How to find the minimum of $f(x)=\frac{4x^2}{\sqrt{x^2-16}}$ without using the derivative?

Published on 17 Jun 2018 - 9:30

132

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How to sketch an exponential function

Published on 17 Jun 2018 - 12:27

235

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If $\tan (x)>x$. Find interval of $x$.

Published on 17 Jun 2018 - 18:09

58

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Why does this statement hold?

Published on 25 Mar 2026 - 15:57

List Question

Find the maximum value of $2x^2 - 3xy - 2y^2$ subject to the condition that $25x^2 - 20xy + 40y^2 = 36$

Direct proof of maximum of a function implying that the derivative is zero?

Calculate the maximum of $f(x,y)=\left|\frac{\sin(xy)}{x\sqrt{y}}\right|$

Min max optimization of convex indefinite function (2)

Penalty method for $f(x,y,z) = x^2 + 2y^2 + z^2$

How fast decrease a limit of a maximum?

Maximum principle application

Maximize $f(x,y)=xy$ subject to $x^2-yx+y^2 = 1$

Find the minimizer of $A=12a+13b+11c$

Showing equivalence between two constrained maximisation problems

If $F_0\cap G_0=\emptyset$ then $x$ is a local minimum of function

How to find the minimum of $f(x)=\frac{4x^2}{\sqrt{x^2-16}}$ without using the derivative?

How to sketch an exponential function

If $\tan (x)>x$. Find interval of $x$.

Why does this statement hold?

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