1. Not finding help here? Sign up for a free 30min 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!

Solving an equation

  1. Aug 29, 2013 #1
    how can I solve this using algebraic methods? I know the solution is x = 1 from just looking at it, but not sure how to do it algebraically:

    ## x + 3^x = 4 ##
     
  2. jcsd
  3. Aug 29, 2013 #2
  4. Aug 29, 2013 #3
    You can set f(x) = x+3^x-4, take x=1 as a solution to f(x) = 0 and look if it is monotonic to show that it has no other solutions. Algebraically is not possible.
     
  5. Aug 29, 2013 #4
    a very strange way of writing one:

    [tex]x=\frac{-W(3^4\ln(3))}{\ln(3)}+4=1[/tex]
     
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook

Have something to add?
Draft saved Draft deleted



Similar Discussions: Solving an equation
  1. Solving equations :/ (Replies: 2)

  2. Solve this equation (Replies: 10)

  3. Solve the equation (Replies: 1)

  4. Solving the equation (Replies: 5)

  5. Solving an equation (Replies: 4)

Loading...