Calculating Force Components for U = 7x^2 + 9xy + 3(y^2)z

[Stryder_SW]

Homework Statement

If U = 7x^2 + 9xy + 3(y^2)z, what are the components of the force vector F ?

The Attempt at a Solution

These are the answers I've come up with. I've gotten Fy and Fz correct, but the Fx is wrong and I'm pretty sure its actually right. However, I would love to be proven wrong lol.
Fx=-14x-9y
Fy=-9x-6yz
Fz=-3y^2

 

[tiny-tim]

Welcome to PF!

Hi Stryder_SW! Welcome to PF!

If U = 7x^2 + 9xy + 3(y^2)z, what are the components of the force vector F ?
…
Fx=-14x-9y
Fy=-9x-6yz
Fz=-3y^2

Well, your F_x looks right to me.

 

[Stryder_SW]

yeah, I'm about to message my professor lol.