Quantcast

Got Homework?

Connect with other students for help. It's a free community.

  • across
    MIT Grad Student
    Online now
  • laura*
    Helped 1,000 students
    Online now
  • Hero
    College Math Guru
    Online now

Here's the question you clicked on:

55 members online
  • 0 replying
  • 0 viewing

dabears900

Help!! I have no idea!

  • 2 years ago
  • 2 years ago

  • This Question is Closed
  1. dabears900
    Best Response
    You've already chosen the best response.
    Medals 0

    • 2 years ago
    1 Attachment
  2. animalsavior94
    Best Response
    You've already chosen the best response.
    Medals 0

    whatd your question?

    • 2 years ago
  3. dabears900
    Best Response
    You've already chosen the best response.
    Medals 0

    see attached ^^^

    • 2 years ago
  4. animalsavior94
    Best Response
    You've already chosen the best response.
    Medals 0

    i just did and ummmm im not very sure about it sorry:(

    • 2 years ago
  5. dabears900
    Best Response
    You've already chosen the best response.
    Medals 0

    no probs! I hope someone might

    • 2 years ago
  6. rsvitale
    Best Response
    You've already chosen the best response.
    Medals 2

    the direction of the gradient is the direction of greatest increase

    • 2 years ago
  7. rsvitale
    Best Response
    You've already chosen the best response.
    Medals 2

    so take (dF/dx,dF/dy) at the point (-1,1) and that vector points in the direction of greatest increase

    • 2 years ago
  8. rsvitale
    Best Response
    You've already chosen the best response.
    Medals 2

    the magnitude of that vector is the greatest rate of change

    • 2 years ago
  9. rsvitale
    Best Response
    You've already chosen the best response.
    Medals 2

    do you know how to find the partial derivatives?

    • 2 years ago
  10. dabears900
    Best Response
    You've already chosen the best response.
    Medals 0

    yes, sorry I'm doing work at the same time

    • 2 years ago
  11. dabears900
    Best Response
    You've already chosen the best response.
    Medals 0

    fx= 2x +y fy = x

    • 2 years ago
  12. dabears900
    Best Response
    You've already chosen the best response.
    Medals 0

    ?

    • 2 years ago
  13. amistre64
    Best Response
    You've already chosen the best response.
    Medals 0

    those look good for the gradient stuff

    • 2 years ago
  14. rsvitale
    Best Response
    You've already chosen the best response.
    Medals 2

    yep they are right, now evaluate the derivatives at the specified point and you have the gradient vector. Then you can find magnitude.

    • 2 years ago
  15. dabears900
    Best Response
    You've already chosen the best response.
    Medals 0

    so eval at (-1,1) fx=-1 fy =-1

    • 2 years ago
  16. dabears900
    Best Response
    You've already chosen the best response.
    Medals 0

    don't I need a z point?

    • 2 years ago
  17. dabears900
    Best Response
    You've already chosen the best response.
    Medals 0

    magnitude is \sqrt((a_1)^2 + (a_2)^2) so I use the -1,-1 ?

    • 2 years ago
  18. dabears900
    Best Response
    You've already chosen the best response.
    Medals 0

    so the magnitdue is sqrt(2) ?

    • 2 years ago
  19. chaguanas
    Best Response
    You've already chosen the best response.
    Medals 0

    \[<-1/\sqrt{2}, 1/\sqrt{2}>\]

    • 2 years ago
    • Attachments:

See more questions >>>

Your question is ready. Sign up for free to start getting answers.

spraguer (Moderator)
5 → View Detailed Profile

is replying to Can someone tell me what button the professor is hitting...

23

  • Teamwork 19 Teammate
  • Problem Solving 19 Hero
  • You have blocked this person.
  • ✔ You're a fan Checking fan status...

Thanks for being so helpful in mathematics. If you are getting quality help, make sure you spread the word about OpenStudy.

This is the testimonial you wrote.
You haven't written a testimonial for Owlfred.