anonymous
  • anonymous
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)
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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chestercat
  • chestercat
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helpmeplease
  • helpmeplease
Your f(x) is strange. It should be f(x,y). Do you mean f(x,y) = x^2-2y? 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
  • anonymous
it could be, i'm just taking the problem off of my worksheet and that's what it says.
helpmeplease
  • helpmeplease
You 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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