A small ball is released from $(-1,2,11)$ on $z=x^3-3xy^2$. Which vector does it start moving on? I found the normal $(-9,12,-1)$ and I know its not the answer. I really don't have any idea other then that. There no additional information given.
2026-04-30 02:14:50.1777515290
Given point and function find the vector
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