Let $z = f ( x , y ) = e ^ { ( x / y ) }$ .Find the instantaneous rate of change of f at the point $( 5,5 )$ in the direction of the point $( 8,11 )$ .

Name: Let $z = f ( x , y ) = e ^ { ( x / y ) }$ .Find the instantaneous rate of change of f at the point $( 5,5 )$ in the direction of the point $( 8,11 )$ .
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The Answer of Let $z = f ( x , y ) = e ^ { ( x / y ) }$ .Find the instantaneous rate of change of f at the point $( 5,5 )$ in the direction of the point $( 8,11 )$ .

Let z=f(x,y)=e(x/y)z = f ( x , y ) = e ^ { ( x / y ) }z=f(x,y)=e(x/y)

Let $z = f ( x , y ) = e ^ { ( x / y ) }$