Question: Example 5 . 1 0 Consider the scalar function ( x , y , z ) = x 2 y z 3 and the point

Example 5.10
Consider the scalar function (x,y,z)=x2yz3 and the point P(2,1,-1).
(1) Find the directional derivative of at P(2,1,-1) in the direction of the vector i-2j+2k.
(2) Find the maximum and minimum values of directional derivative of (x,y,z) at P(2,1,-1) and find the directions for which these occur.
Example 5 . 1 0 Consider the scalar function ( x

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