Gilbert Strang, Calculus, 3rd edition (Wellesley-Cambridge Press; MIT OpenCourseWare RES.18-001) §13.1 Surfaces and Level Curves, #2 · Multivariable Calculus · Partial derivatives

The level curves of all four functions are ______

The level curves of all four functions are ______. They enclose the maximum at ______. Draw the four curves $f (x, y) = 1$ and rank them by increasing radius.

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Gilbert Strang, Calculus, 3rd edition (Wellesley-Cambridge Press; MIT OpenCourseWare RES.18-001) · §13.1 Surfaces and Level Curves, #2

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