IIT JAM
Vanshika Asked a Question
May 31, 2020 4:35 pmpts 30 pts
  • IIT JAM
  • Physics (PH)

What is the directional derivative of = x²y + xz at (1, 2, -1) in the direction a =2i-2j+k.

What is the directional derivative of = x²y + xz at (1, 2, -1) in the direction A =2i-2j+k.
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  • Chandra dhawan thankyou
    see attached file
    • cropped-436290544.jpg
    Likes(1) Reply(0)
  • Ruby negi thankyou
    gradient of any surface is perpendicular to the surface...
    • cropped-1383327203.jpg
    Likes(2) Reply(4)
    Ruby negi
    see the attached solution .
  • Dhairya sharma
    dear , most important thing for directional derivative is that......we have to find grad of the function because it's always perpendicular to a given surface. when we want out it i...
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    Dhairya sharma
    did u get the concept dear
  • Dhairya sharma Best Answer
    see attached dear
    • cropped3987580076858421747.jpg
    Likes(1) Reply(5)
    Dhairya sharma
    dear gradient is perpendicular to surface or in the direction of normal.
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