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QUESTION 12 Find the directional derivative of f (x,y,z) =x tan '1(yz) at (4,1,1) in the direction of the vector QUESTION 13 Find the maximum
QUESTION 12 Find the directional derivative of f (x,y,z) =x tan '1(yz) at (4,1,1) in the direction of the vector QUESTION 13 Find the maximum value of the directional derivative of f (15,)! ,z) =xe3'z at the point (2,0, 4) QUESTION 14 For f(x,y)=~/'y/ 1+t3dt I find i (2:2) Question 6 x y - xy 3 if x , y + (0,0) f ( x , y) = x 2 + y2 0 if ( x , y ) = (0,0 ) of evaluate ax 0,0
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