Consider the function g defined by g(x,y)=cos⁡(πxy)+1/log3⁡(x−y). Do as indicated. 1. Determine ∂2g/∂y∂x 2. Calculate the instantaneous rate of change of g at the point (4,1,2) in the direction of the vector ⟨1,2⟩.  3.In what direction does g attain its maximum directional derivative at the point (4,1)? What is the maximum directional derivative?

Advanced Engineering Mathematics
10th Edition
ISBN:9780470458365
Author:Erwin Kreyszig
Publisher:Erwin Kreyszig
Chapter2: Second-order Linear Odes
Section: Chapter Questions
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Consider the function g defined by g(x,y)=cos⁡(πxy)+1/log3⁡(x−y). Do as indicated.

1. Determine ∂2g/∂y∂x

2. Calculate the instantaneous rate of change of g at the point (4,1,2) in the direction of the vector ⟨1,2⟩. 

3.In what direction does g attain its maximum directional derivative at the point (4,1)? What is the maximum directional derivative? 

 

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