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

dan18 Group Title

The maximum value of the function

  • one year ago
  • one year ago

  • This Question is Closed
  1. hartnn Group Title
    Best Response
    You've already chosen the best response.
    Medals 1

    can be found by taking the derivative of that funtion and equating it to 0.

    • one year ago
  2. dan18 Group Title
    Best Response
    You've already chosen the best response.
    Medals 1

    y=\[\sqrt{2-x}\]

    • one year ago
  3. hartnn Group Title
    Best Response
    You've already chosen the best response.
    Medals 1

    so did u find y' ?

    • one year ago
  4. dan18 Group Title
    Best Response
    You've already chosen the best response.
    Medals 1

    y=-4[\sqrt{2-x}\]

    • one year ago
  5. hartnn Group Title
    Best Response
    You've already chosen the best response.
    Medals 1

    could u differentiate y ?

    • one year ago
  6. miteshchvm Group Title
    Best Response
    You've already chosen the best response.
    Medals 0

    differentiate the function, then put the differentiated equation = 0 you will have either one answer or 2, if you get two answers, the one which has negative value will be the maximum value of the function ;)

    • one year ago
  7. dan18 Group Title
    Best Response
    You've already chosen the best response.
    Medals 1

    is it the y value?

    • one year ago
  8. hartnn Group Title
    Best Response
    You've already chosen the best response.
    Medals 1

    have u learned to differentiate x^n ?

    • one year ago
  9. dan18 Group Title
    Best Response
    You've already chosen the best response.
    Medals 1

    y'= nx^n-1

    • one year ago
  10. hartnn Group Title
    Best Response
    You've already chosen the best response.
    Medals 1

    so couldn't u differentiate y=-4 sqrt(2-x) ??

    • one year ago
  11. dan18 Group Title
    Best Response
    You've already chosen the best response.
    Medals 1

    does the max. value asked here is the x or the y value?

    • one year ago
  12. hartnn Group Title
    Best Response
    You've already chosen the best response.
    Medals 1

    y value

    • one year ago
  13. dan18 Group Title
    Best Response
    You've already chosen the best response.
    Medals 1

    y'= 2/(2-x)^-(1/2)

    • one year ago
  14. akash_809 Group Title
    Best Response
    You've already chosen the best response.
    Medals 0

    @dan18 , the correct way is to differentiate and equate to zero , but just by looking at this question once can tell it's maximum value is infinity for x=-infinity....pretty weird question i guess...are u sure u hv typed the question correctly

    • one year ago
  15. hartnn Group Title
    Best Response
    You've already chosen the best response.
    Medals 1

    wouldn't it be y'= 2/((2-x)^(1/2))

    • one year ago
  16. dan18 Group Title
    Best Response
    You've already chosen the best response.
    Medals 1

    I get x=2 @ y', then subts. it to the eq. does the max. value = 0?

    • one year ago
  17. akash_809 Group Title
    Best Response
    You've already chosen the best response.
    Medals 0

    @dan18 is the question correct ?

    • one year ago
  18. hartnn Group Title
    Best Response
    You've already chosen the best response.
    Medals 1

    but actual answer is infact Max. value = 0 when x=2 http://www.wolframalpha.com/input/?i=y%3D-4+sqrt%282-x%29

    • one year ago
  19. dan18 Group Title
    Best Response
    You've already chosen the best response.
    Medals 1

    \[y=-4\sqrt{2-x}\]

    • one year ago
  20. dan18 Group Title
    Best Response
    You've already chosen the best response.
    Medals 1

    thak you guys!

    • one year ago
  21. akash_809 Group Title
    Best Response
    You've already chosen the best response.
    Medals 0

    now u hv got the correct question, yes the max would be zero

    • one year 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.