# Thread: Normal to a Surface

1. ## Normal to a Surface

I'd be VERY grateful for any help anyone can offer!

Find the normal vector to the surface described by:

I really have no idea where to begin. I can find the partial derivatives but not sure if I even need to use them.

Thanks for any help!

2. Originally Posted by Spimon
I'd be VERY grateful for any help anyone can offer!

Find the normal vector to the surface described by:

I really have no idea where to begin. I can find the partial derivatives but not sure if I even need to use them.

Thanks for any help!
Ummmm, this is an ellipsoid. There are going to be many many normal vectors to this. (Any vector is normal to it at some point on the surface, in fact.) Do you have a specific point you need to find a normal at?

-Dan