Question: Let f ( x , y , z ) = x l n ( y + z ) , vec ( v ) = 8

Let f(x,y,z)=xln(y+z),vec(v)=8i+9j+3k, and P=(2,e,e).
Calculate the directional derivative in the direction of vec(v)at the given point.
(Use symbolic notation and fractions where needed.)
Duf(2,e,e)=, help (fractions)
Let f ( x , y , z ) = x l n ( y + z ) , vec ( v )

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