What's the minimum or maximum of U?

Differentiating I get:

So, is it correct to say that both the partial differentials are constant, therefore there is no minimum or maximum?

-Scott

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- Oct 18th 2007, 06:52 AMScottOmin/max for partial differential

What's the minimum or maximum of U?

Differentiating I get:

So, is it correct to say that both the partial differentials are constant, therefore there is no minimum or maximum?

-Scott - Oct 18th 2007, 07:24 AMSoroban
Hello, Scott!

Quote:

What's the minimum or maximum of ?

. .

. .

Since I could see that can increase without bound,

. . I suspected that we had found a minimum value.

Then I tried the Second Partials Test . . .

. . . .

. . . . negative

Therefore: . .is a*saddle point.*

. . The function has neither a maximum nor a minimum.