Solution
= Solution
Differentiate with respect to the two <Cartesian coordinates>:
$$
\boxed{\nabla h=(6x^5-48xy^2,\ 6y^5-48x^2y)^T
=6\bigl(x(x^4-8y^2),\ y(y^4-8x^2)\bigr)^T}.
$$
= Solution
Differentiate with respect to the two <Cartesian coordinates>:
$$
\boxed{\nabla h=(6x^5-48xy^2,\ 6y^5-48x^2y)^T
=6\bigl(x(x^4-8y^2),\ y(y^4-8x^2)\bigr)^T}.
$$