1. Limited time only! Sign up for a free 30min personal tutor trial with Chegg Tutors
    Dismiss Notice
Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Homework Help: Calculus Problem, Finding the Inverse of a function

  1. Apr 1, 2009 #1
    1. The problem statement, all variables and given/known data

    http://img17.imageshack.us/img17/4413/asasasasas.jpg [Broken]

    2. Relevant equations
    let t = e^x.

    3. The attempt at a solution

    f(x) = sqrt(ln(x))

    f_inv(x) = exp(x^2)

    is that it? Nothing more to it?
    Last edited by a moderator: May 4, 2017
  2. jcsd
  3. Apr 1, 2009 #2


    Staff: Mentor

    I don't see anything wrong with your work. You can check to see that f-1(f(x)) = f(f-1(x)) = x.
  4. Apr 1, 2009 #3


    User Avatar
    Science Advisor

    I wish you would NOT say "let [itex]t= e^x[/itex]" and then write "f(x)= sqrt(ln(x))" when you mean "f(t)= sqrt(ln(t))"!
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook