Results 1 to 2 of 2

Math Help - Variables in Exponents

  1. #1
    Newbie
    Joined
    Jul 2010
    Posts
    1

    Variables in Exponents

    I've been having problems with this equation:

    x+3^x<4

    I know the answer but not a non-graphical way to solve it. The best I can get is

    x<log_3(4-x)

    but can't seem to move all x to one side. Help would be appreciated!
    Follow Math Help Forum on Facebook and Google+

  2. #2
    MHF Contributor
    skeeter's Avatar
    Joined
    Jun 2008
    From
    North Texas
    Posts
    12,116
    Thanks
    1000
    Quote Originally Posted by questrian View Post
    I've been having problems with this equation:

    x+3^x<4

    I know the answer but not a non-graphical way to solve it. The best I can get is

    x<log_3(4-x)

    but can't seem to move all x to one side. Help would be appreciated!
    you will not be able to use elementary algebraic techniques to solve this inequality, however, note (by observation) that if x = 1 , x + 3^x = 4

    it should be fairly obvious that the solution set for the given inequality is x < 1
    Follow Math Help Forum on Facebook and Google+

Similar Math Help Forum Discussions

  1. Equations with variables and exponents
    Posted in the Algebra Forum
    Replies: 8
    Last Post: November 7th 2010, 04:58 PM
  2. how to solve equations with variables as exponents?
    Posted in the Pre-Calculus Forum
    Replies: 5
    Last Post: October 11th 2010, 01:15 PM
  3. Square root with variables and exponents?
    Posted in the Algebra Forum
    Replies: 3
    Last Post: August 27th 2009, 12:49 PM
  4. Replies: 4
    Last Post: October 2nd 2008, 03:44 PM
  5. Replies: 3
    Last Post: November 7th 2007, 04:44 PM

Search Tags


/mathhelpforum @mathhelpforum