Directional Derivative

  • Thread starter karens
  • Start date
  • #1
7
0
nvmnd - solved
 
Last edited:

Answers and Replies

  • #2
307
3
Hey karens,

Well you have the formula written above. Why don't you start by showing us what [tex]f_x (2,1), f_y (2,1)[/tex] are and what [tex]a, b[/tex] should be considering your unit vector [tex]\left(\frac{3}{5}, \frac{-4}{5}\right)[/tex].
 

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