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Gilbert Strang, Calculus, 3rd edition (Wellesley-Cambridge Press; MIT OpenCourseWare RES.18-001) §13.4 Directional Derivatives and Gradients, #27 · Multivariable Calculus · Gradient & optimization

Grad … is perpendicular to … with length 1, and grad …

Grad $f$ is perpendicular to $2 i + j$ with length 1, and grad $g$ is parallel to $2 i + j$ with length 5. Find grad $f$ , grad $g$ , $f$ , and $g$ .

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Gilbert Strang, Calculus, 3rd edition (Wellesley-Cambridge Press; MIT OpenCourseWare RES.18-001) · §13.4 Directional Derivatives and Gradients, #27

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