Electric Potential / Electric Field Question

[baillik]

In a certain region of space, the electric potential is given by V = y^2 + 5xy - 2xyz. Determine the x-, y-, and z-components of the electric field, E, at (5, 2, 3). Do not enter units.

I took the partial derivatives with respect to each coordinate:

Ex = -∂V/∂x = -[5y-2yz] = -5y+2yz
Ey = -∂V/∂y = -[2y + 5x - 2xz] = -2y-5x+2xz
Ez = -∂V/∂z = -[-2xy] = 2xy

Then I plugged the coordinates into the equations
Ex = 2
Ey = 1
Ez = 20

These answers are wrong and they don't have enough significant figures either. I am completely lost please help!

 

[gneill]

Well, it's a mystery! The problem gave the x,y,z position to essentially infinite precision, so your answer looks to me to be perfectly acceptable.