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anonymous
 5 years ago
1. Find the directional derivative of f(x)= x^2=2y in the direction of 3i=4j. Evaluate the directional derivative at the point (1,2,6)
anonymous
 5 years ago
1. Find the directional derivative of f(x)= x^2=2y in the direction of 3i=4j. Evaluate the directional derivative at the point (1,2,6)

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helpmeplease
 5 years ago
Best ResponseYou've already chosen the best response.0Your f(x) is strange. It should be f(x,y). Do you mean f(x,y) = x^22y? If so, then you can take the gradient of f(x,y), then take the dot product of the components with the direction. Then you can plug in the point and solve.

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0it could be, i'm just taking the problem off of my worksheet and that's what it says.

helpmeplease
 5 years ago
Best ResponseYou've already chosen the best response.0You might have to use the limit definition of a directional derivative then. The function f(x) might be (x^2)/2.
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