Evaluate at if

Part of me says I must solve this in terms of z in order to find but I can't see how.

The other part thinks I can just find implicitly and plug in the point but I am getting an answer that doesn't make any sense.

What should I do?

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- Jun 8th 2010, 04:00 AMShananayEvaluating a First Partial at a Point
Evaluate at if

Part of me says I must solve this in terms of z in order to find but I can't see how.

The other part thinks I can just find implicitly and plug in the point but I am getting an answer that doesn't make any sense.

What should I do? - Jun 8th 2010, 04:20 AMp0oint
You need to find:

So differentiate implicitly with respect to x, assuming that y is constant and you will get - Jun 8th 2010, 04:21 AMp0oint
You need to find:

So differentiate implicitly with respect to x, assuming that y is constant and you will get - Jun 8th 2010, 04:23 AMProve It
- Jun 8th 2010, 04:26 AMShananay
How do I treat z?

I have something like then factor and solve for ?

I don't feel like that's right. - Jun 8th 2010, 04:43 AMProve It
- Jun 8th 2010, 04:46 AMp0oint
- Jun 8th 2010, 04:56 AMShananay
Thank you both very much. I understand now.