# Directional Derivative

## Directional Derivative : Derivative of a function along any given specific direction

## Significance of Directional Derivative:

In the following activity you can change the function to find directional derivative at the point input and along the vector .
gives direction of maximum change.
Significance of Directional Derivative ( ):
if there is a very small change in the input along the direction of vector , then corresponding change in the output will be times the evaluated at

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