Figure 8.53 is a contour diagram of f(x, y). In each of the following cases, list the

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Figure 8.53 is a contour diagram of f(x, y). In each of the following cases, list the marked points in the diagram (there may be none or more than one) at which
(a) fx < 0

(b) fy > 0 

(c) fxx > 0 

(d) fyy < 0

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Applied Calculus

ISBN: 9781119275565

6th Edition

Authors: Deborah Hughes Hallett, Patti Frazer Lock, Andrew M. Gleason, Daniel E. Flath, Sheldon P. Gordon, David O. Lomen, David Lovelock, William G. McCallum, Brad G. Osgood, Andrew Pasquale

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