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## #1 Re: Exercises » How can I find the minima, maxima when I have multivariable problem » 2015-10-18 16:03:05

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

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

## #2 Exercises » How can I find the minima, maxima when I have multivariable problem » 2015-10-18 07:42:15

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
\$\$

## #3 Re: Exercises » problem with probabilities » 2010-02-07 01:46:30

thanks a lot for your help!

## #4 Exercises » problem with probabilities » 2010-01-27 03:03:39

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