Crazy Exponential Equation

Discussion in 'Algebra' started by nycmathguy, Nov 24, 2021.

  1. nycmathguy

    nycmathguy

    Joined:
    Jun 27, 2021
    Messages:
    5,386
    Likes Received:
    422
    I also found this exponential equation on You Tube.

    Solve for x.

    x^2 = 2^(x)

    What would you do?

    Is it right to take the natural log on both sides?

    ln(x^2) = ln(2^x)

    2lnx = x•ln2

    If this is the correct first couple of steps, where do we go from here?

    NOTE: I can watch the entire video and learn how it is done. I'd rather try to solve it on my own without the video clip. It's more fun this way.
     
    nycmathguy, Nov 24, 2021
    #1
  2. nycmathguy

    MathLover1

    Joined:
    Jun 27, 2021
    Messages:
    2,989
    Likes Received:
    2,884
    so far correct .....good luck
     
    MathLover1, Nov 24, 2021
    #2
  3. nycmathguy

    nycmathguy

    Joined:
    Jun 27, 2021
    Messages:
    5,386
    Likes Received:
    422
    Ita "good luck" Wednesday.
     
    nycmathguy, Nov 24, 2021
    #3
  4. nycmathguy

    HallsofIvy

    Joined:
    Nov 6, 2021
    Messages:
    161
    Likes Received:
    78
    There is not going to be any "elementary" way to solve this. You should be able to convert into a form where you can use "Lambert's W function" which is defined as the inverse function to f(x)= xe^x.
     
    Last edited: Nov 27, 2021
    HallsofIvy, Nov 27, 2021
    #4
    nycmathguy likes this.
  5. nycmathguy

    nycmathguy

    Joined:
    Jun 27, 2021
    Messages:
    5,386
    Likes Received:
    422
    When I realized that the problem is beyond my level of study, I gave up. It looks interesting but I gave up. Sorry.
     
    nycmathguy, Nov 27, 2021
    #5
Ask a Question

Want to reply to this thread or ask your own question?

You'll need to choose a username for the site, which only take a couple of moments (here). After that, you can post your question and our members will help you out.
Similar Threads
There are no similar threads yet.
Loading...