Jojan

09-17-2008, 01:32 PM

I have the answer but don't know how to get to it.

http://upload.wikimedia.org/math/1/2/3/123a68b477a9abbc1f6c85bb2bb9b0af.png

I really don't understand the last step. Please try to explain it to me. You don't need to know anymore than the above to solve the problem, but I can post the full exercise if you want.

I know it's probably smarter to just send an e-mail to my docent, but this way would be more fun.

If the image doesn't appear as it should, then paste the following code into any Wikipedia page and press the button to preview it.

:<math>\frac{\partial^2 z}{\partial s^2} = \frac{\partial}{\partial s} \left( 2 \frac{\partial z}{\partial x} + 3 \frac{\partial z}{\partial y} \right) = 4 \frac{\partial z}{\partial x} + 12 \frac{\partial z}{\partial x \partial y} + 9 \frac{\partial z}{\partial y}</math>

http://upload.wikimedia.org/math/1/2/3/123a68b477a9abbc1f6c85bb2bb9b0af.png

I really don't understand the last step. Please try to explain it to me. You don't need to know anymore than the above to solve the problem, but I can post the full exercise if you want.

I know it's probably smarter to just send an e-mail to my docent, but this way would be more fun.

If the image doesn't appear as it should, then paste the following code into any Wikipedia page and press the button to preview it.

:<math>\frac{\partial^2 z}{\partial s^2} = \frac{\partial}{\partial s} \left( 2 \frac{\partial z}{\partial x} + 3 \frac{\partial z}{\partial y} \right) = 4 \frac{\partial z}{\partial x} + 12 \frac{\partial z}{\partial x \partial y} + 9 \frac{\partial z}{\partial y}</math>