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Gilbert Strang, Calculus, 3rd edition (Wellesley-Cambridge Press; MIT OpenCourseWare RES.18-001) §13.4 Directional Derivatives and Gradients, #34 · Multivariable Calculus · Gradient & optimization

A quadratic function … has the gradients shown in Figure B

A quadratic function $a x^{2} + b y^{2} + c x + d y$ has the gradients shown in Figure B. Estimate $a, b, c, d$ and sketch two level curves.

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Gilbert Strang, Calculus, 3rd edition (Wellesley-Cambridge Press; MIT OpenCourseWare RES.18-001) · §13.4 Directional Derivatives and Gradients, #34

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