Use the graph of the surface to determine the sign of each partial derivative. Explain your reasoning.
Question:
Use the graph of the surface to determine the sign of each partial derivative. Explain your reasoning.
(a) ƒx(4,1)
(b) ƒy(4, 1)
(c) ƒx(-1, -2)
(d) ƒy(-1, -2)
Transcribed Image Text:
-5 X 10 N -y
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