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

saifoo.khan Group Title

Logarithms

  • 2 years ago
  • 2 years ago

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

    I thought you were soo smart, that you would know them by now. LOL jk jk.

    • 2 years ago
  2. saifoo.khan Group Title
    Best Response
    You've already chosen the best response.
    Medals 1

    Lol. I'm not a calculator. I can get stuck too! :P @OpenstudyUser

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

    Try distributing.

    • 2 years ago
  4. saifoo.khan Group Title
    Best Response
    You've already chosen the best response.
    Medals 1

    \[ \Large 9^{2x} + 2(9^{x+1}) = 40 \] Correction^

    • 2 years ago
  5. saifoo.khan Group Title
    Best Response
    You've already chosen the best response.
    Medals 1

    Just tell me the next and step after that please.

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

    write 9^(x+1) as 9^x.9 then put y=9^x. solve the quadratic

    • 2 years ago
  7. saifoo.khan Group Title
    Best Response
    You've already chosen the best response.
    Medals 1

    DANG!!! KILL ME!!!! My teacher told me that. -_- Thanks for recalling @hartnn

    • 2 years ago
  8. saifoo.khan Group Title
    Best Response
    You've already chosen the best response.
    Medals 1

    Just guessing, can't we do it like this? \[9^{2x} + 2(9^x \times 9) = 40\] Ans so on?

    • 2 years ago
  9. saifoo.khan Group Title
    Best Response
    You've already chosen the best response.
    Medals 1

    Next? @micahwood50

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

    didn't i tell u to do just that?

    • 2 years ago
  11. saifoo.khan Group Title
    Best Response
    You've already chosen the best response.
    Medals 1

    Yes, but you said me to write 9^x = y Got that. But can't we solve it by another way? Something like: \[9^{2x} + 2(9^x)\times 18=40\]

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

    nopes, i don't think so....no formula for log(a+b) or log (a-b)

    • 2 years ago
  13. saifoo.khan Group Title
    Best Response
    You've already chosen the best response.
    Medals 1

    I see. THanks man.

    • 2 years ago
  14. saifoo.khan Group Title
    Best Response
    You've already chosen the best response.
    Medals 1

    Did you missed a +sign in your first step? @micahwood50

    • 2 years ago
  15. saifoo.khan Group Title
    Best Response
    You've already chosen the best response.
    Medals 1

    @OpenstudyUser kept on distributing. :D

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

    I atleast tried -_-

    • 2 years ago
  17. micahwood50 Group Title
    Best Response
    You've already chosen the best response.
    Medals 0

    Just do what hartnn told you to do.

    • 2 years ago
  18. saifoo.khan Group Title
    Best Response
    You've already chosen the best response.
    Medals 1

    I want to learn your method too! @micahwood50

    • 2 years ago
  19. micahwood50 Group Title
    Best Response
    You've already chosen the best response.
    Medals 0

    My "method" is incorrect. I just though lnab = ln (a + b), but it's actually lna + lnb so forgot it.

    • 2 years ago
  20. saifoo.khan Group Title
    Best Response
    You've already chosen the best response.
    Medals 1

    Oh. No problem. Thanks for trying though. :)

    • 2 years ago
  21. saifoo.khan Group Title
    Best Response
    You've already chosen the best response.
    Medals 1

    I solved it @hartnn . got: x = 0.315

    • 2 years ago
  22. hartnn Group Title
    Best Response
    You've already chosen the best response.
    Medals 1

    what roots of quadratic did u get?

    • 2 years ago
  23. saifoo.khan Group Title
    Best Response
    You've already chosen the best response.
    Medals 1

    2, -20

    • 2 years ago
  24. hartnn Group Title
    Best Response
    You've already chosen the best response.
    Medals 1

    yup. can't be -20 so 9^x=2 x=0.315 u are correct!

    • 2 years ago
  25. saifoo.khan Group Title
    Best Response
    You've already chosen the best response.
    Medals 1

    Yep. Thanks.

    • 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.