A community for students.

Here's the question you clicked on:

55 members online
  • 0 replying
  • 0 viewing

anonymous

  • one year ago

If f(x)=log3 (x+1), what is f-1(2)

  • This Question is Closed
  1. anonymous
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    3log(3)

  2. anonymous
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    The answers are 1,8,10,27

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

    You found f(2) @asdfghjkl24562

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

    solve for x \[2=\log_3(x+1)\]

  5. anonymous
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    ohhhhhhh

  6. Michele_Laino
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 1

    hint: using the definition of logarithm, we can write: \[\Large x + 1 = {3^y}\]

  7. carolinar7
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    Oh the logarithmic is the in the inverse of exponential functions, so all you have to do is cinvert it to an exponential function and substitute the velue

  8. anonymous
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    You guys are amazing

  9. carolinar7
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    \[(2)+1=3^{y}\]

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

    thanks!

  11. carolinar7
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    3=3\[^{y}\]

  12. carolinar7
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    \[3 = 3^{y}\]

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

    it's suppose to be \[3^2=x+1\]

  14. carolinar7
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    no

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

    \[f^{-1}(2) =x \text{ implies } f(x)=2 \\ \text{ so we need to solve } 2=\log_3(x+1) \\ \text{ and converting to exponential form gives } \\ 3^2=x+1\]

  16. carolinar7
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    Oh ya

  17. 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.