Solution
= Solution
The <gradient> is $(x-1,y-1,z-1)^T$. At the origin this gives
$$
\boxed{\nabla\Phi(0,0,0)=(-1,-1,-1)^T}.
$$
= Solution
The <gradient> is $(x-1,y-1,z-1)^T$. At the origin this gives
$$
\boxed{\nabla\Phi(0,0,0)=(-1,-1,-1)^T}.
$$