The vector normal to the gradient of the function f:R^3toR defined by f(x,y,z)=xy+y^2+z at the point P=(1,-1,1) is:

Q43Section II (Mathematics)43 of 190

A vector orthogonal to the gradient

The vector normal to the gradient of the function $f:\mathbb{R}^3\to\mathbb{R}$ defined by $f(x,y,z)=xy+y^2+z$ at the point $P=(1,-1,1)$ is:

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