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Gilbert Strang, Calculus, 3rd edition (Wellesley-Cambridge Press; MIT OpenCourseWare RES.18-001) §13.4 Directional Derivatives and Gradients, #25 · Multivariable Calculus · Gradient & optimization

Choose two functions … that depend only on

Choose two functions $f (x, y)$ that depend only on $x + 2 y$ . Their gradients at $(1, 1)$ are in the direction ____. Their level curves are ____.

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Gilbert Strang, Calculus, 3rd edition (Wellesley-Cambridge Press; MIT OpenCourseWare RES.18-001) · §13.4 Directional Derivatives and Gradients, #25

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