Find the maximum value of the directional derivative at the point 
of the function 
. Round your answer to two decimal places.
Definitions:
Ionic
Relating to ions or the chemical bonds formed through the electrical attraction between oppositely charged ions.
Bonding
The attractive force that holds atoms or ions together in a molecule or compound, forming a stable substance.
Lewis Structure
A schematic that outlines the atomic connections within a molecule and highlights any existing unbonded electron pairs.
Ethyne
A hydrocarbon with the chemical formula C2H2, characterized by a triple bond between two carbon atoms, making it the simplest alkyne.
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