MediumPartial derivatives

Gilbert Strang, Calculus, 3rd edition (Wellesley-Cambridge Press; MIT OpenCourseWare RES.18-001) §13.1 Surfaces and Level Curves, #23 · Multivariable Calculus · Partial derivatives

(b) The contour lines of … ______ are the circles … on…

(a) The contour lines of $z = x^{2} + y^{2} - 2 x - 2 y$ are circles around the point ______, where $z$ is a minimum.

(b) The contour lines of $f =$ ______ are the circles $x^{2} + y^{2} = c + 1$ on which $f = c$ .

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Gilbert Strang, Calculus, 3rd edition (Wellesley-Cambridge Press; MIT OpenCourseWare RES.18-001) · §13.1 Surfaces and Level Curves, #23

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