Quantcast

A community for students.

Here's the question you clicked on:

55 members online
  • 0 replying
  • 0 viewing

Dodo1

  • 2 years ago

PLease Help me with intergals

  • This Question is Closed
  1. Dodo1
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    1 Attachment
  2. Luigi0210
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 1

    \[\int\limits_{7}^{8}f(x)=-8 \] I think..

  3. Luigi0210
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 1

    |dw:1366155033606:dw|

  4. Dodo1
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    Thank you i entred it and your answer was correct!

  5. Dodo1
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    how did you get this?

  6. Luigi0210
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 1

    Well I used the given information and graphed it out I graphed each integral individually

  7. Luigi0210
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 1

    And they gave the over value from 6-9 which is 6 So I added up both integral values: 14-x=6

  8. Dodo1
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    I see. what about the second one?

  9. Luigi0210
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 1

    It would be the opposite.. since it's going backwards whenever the integral has a lower limit that is higher than the upper limit it'll be negative \[\int\limits_{8}^{7}f(x)dx=-\int\limits_{7}^{8}f(x)dx\]

  10. Luigi0210
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 1

    So it's -(-8)=8

  11. Luigi0210
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 1

    Does that make some sense? :l

  12. Dodo1
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    the second one is wrong when I entred it

  13. Luigi0210
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 1

    Woops, I did not see that 6..

  14. Luigi0210
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 1

    \[-\int\limits_{7}^{8} 6(-8)-6\] so it's 54 if I'm not mistaken again :/

  15. Dodo1
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    correct! you are supre. could you explain?

  16. Luigi0210
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 1

    How I obtained the answer?

  17. Dodo1
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    yes,

  18. Luigi0210
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 1

    Well since we know that: \[\int\limits_{7}^{8}f(x)dx=8\] We can switch the integrals around and we already solved for \[\int\limits_{7}^{8}f(x)dx \] we just plug in 8 for \[-\int\limits_{7}^{8}6f(x)-6\]

  19. Luigi0210
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 1

    so it'll be -[6(-8)-6] -[-48-6] -[-54] 54

  20. Luigi0210
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 1

    sorry i meant -8 on the first integral

  21. Dodo1
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    thank you so much

  22. Not the answer you are looking for?
    Search for more explanations.

    • Attachments:

Ask your own question

Sign Up
Find more explanations on OpenStudy
Privacy Policy

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.