Question: calculs 3 Note: please write down the Answer by hand on paper and also write each answer with the number of the questions 2. (a)

calculs 3

Note: please write down the Answer by hand on paper and also write each answer with the number of the questions

and also write each answer with the number of the questions 2.

2. (a) Find the equation of the tangent plane and normal line to the given surface at the specified point. z = 3x2 - y' + 2x; (1, -2, 1) (b) Find the directional derivative of f at the given point in the indicated direction. f ( x , y, z ) = xy + xV 1 + z; (1, 2, 3); 3 = 22 + j-2k

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