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Multivariable & Vectoreasy
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Let f(x,y,z)=x2+y2+z2f(x,y,z) = \sqrt{x^2+y^2+z^2}f(x,y,z)=x2+y2+z2​ represent the distance from the origin in R3\mathbb{R}^3R3. For any point (x,y,z)(x,y,z)(x,y,z) other than the origin, what is the gradient vector ∇f\nabla f∇f?