Exercise 2. Directional derivative (6 pts + 9 pts) Let f(x,y,z) = xy + y2 –...

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Exercise 2. Directional derivative (6 pts + 9 pts) Let f(x,y,z) = xy + y2 – 23 – 105. 1) vf = a. yi + (x + 2y); – 3z2K b. (y

2) The direction in which ſ decreases most rapidly at A(0,1,1) is: a. 14 14 c. wait tasta d tai-haiti e. None of the above

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of it of jaf fy) =j++z-105 SF = c+ j k -4℃ tity - R option a is a is correct 2) Coll) flooli ) 1℃+7-36 unit vector 日子, 母 C+2+ The direction in which f decreases most rapidly . If 고 TIFI here on option to) is correct = 14

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