Question: True or false (b) If Vf(x, y) = 0, then Duf(x, y) = 0 for all u b) If V f (x, y) O, then

b) If V f (x, y) O, then Duf(x, y) O for

True or false

all u.

(b) If Vf(x, y) = 0, then Duf(x, y) = 0 for all u

b) If V f (x, y) O, then Duf(x, y) O for all u.

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