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For each of the graphs below, use the level curves of the function z = f(z,y) to decide the sign (positive, negative, or zero) of each of the partial derivatives at the point P. Assume t and y-axes are in the usual positions. fz(P) is? fy(P) is fzz(P) is positive fw(P) is negative fry(P) is zero fz(P) is? fy(P) is? faz(P) is? fw(P) is? fry(P) is? V v

For each of the graphs below, use the level curves of the function z = f(z,y) to decide the sign (positive, negative, or zero) of each of the partial derivatives at the point P. Assume t and y-axes are in the usual positions. fz(P) is? fy(P) is fzz(P) is positive fw(P) is negative fry(P) is zero fz(P) is? fy(P) is? faz(P) is? fw(P) is? fry(P) is? V v

Advanced Engineering Mathematics
Advanced Engineering Mathematics
10th Edition
ISBN:9780470458365
Author:Erwin Kreyszig
Publisher:Erwin Kreyszig
Chapter2: Second-order Linear Odes
Section: Chapter Questions
Problem 1RQ
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For each of the graphs below, use the level curves of the function z = f(z,y) to decide the sign (positive, negative, or zero) of each of the partial derivatives at the point P. Assume the x- and y-axes are in the usual positions. fz(P) is? fy(P) is fzz(P) is positive f(P) is negative fzy(P) is zero fz(P) is? fy(P) is? fzz(P) is? fwy (P) is? fzy(P) is? ✓
Transcribed Image Text:For each of the graphs below, use the level curves of the function z = f(z,y) to decide the sign (positive, negative, or zero) of each of the partial derivatives at the point P. Assume the x- and y-axes are in the usual positions. fz(P) is? fy(P) is fzz(P) is positive f(P) is negative fzy(P) is zero fz(P) is? fy(P) is? fzz(P) is? fwy (P) is? fzy(P) is? ✓
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