# Thread: Functions of Several variables Q

1. ## Functions of Several variables Q

Hey I am stuck on a question, could someone help me out please

the q is in the link

Imageshack - matht.jpg

Best wishes

2. Ive got Imageshack - dxdy.jpg for the first two questions. Are they correct? I dont know how to do the 3rd and 4th parts. also is the denominator corect?

3. I can't read that...

4. here is the q again- bigger

Imageshack - 33487851.jpg

5. So the function is $f(x,y)= \frac{sin(e^x+ y^2)}{\sqrt{x- y}}$ and you are asked to find the first and second partial derivatives with respect to x and y.

That is tedious but straight forward. What have you done and where did you hit a snag?

6. For the first two questions I got - Imageshack - dxdy.jpg
for the 3rd part I've multiplied the answer to the first part by 2(x-y)^1/2. Then I differatiated to get upto here so far Imageshack - 53381968.jpg. Im not sure if Im correct could you possibly check please?