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I know that I use Lagrange multipliers when I have constraints ..

Is there any example for my case to follow up .?

Thanks in advance

**katerinaaa**- Replies: 3

Hi, I would like your help in the following problem

Locate all relative maxima, relative minima and saddle points, if any, for the function

$$

f(x,y,z)=1-x^2-y^2-z^2

$$

thanks a lot for your help!

**katerinaaa**- Replies: 7

Hi all, I have a problem with probabilities but I can't solve it.

The problem is :

"I have 3 folders. A folder of them has a letter while the others are empty.

The probablity to find the letter in the folder, if we touch the top of the folder is p_j , if there is letter in this folder.

We check folder 1 and we did not touch the letter.

Which is the possibility the letter to be inside the folder 1 ??"

I don't understand, the possibility is 1/3 again I think.

Could you help me please ??

thanks a lot

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