Results 1 to 4 of 4

Math Help - exponentials

  1. #1
    Junior Member
    Joined
    Aug 2008
    From
    England
    Posts
    40

    exponentials

    i need to solve this giving and exact solution...

    2e^(x) + 3e^(-x)=7

    thanks
    Follow Math Help Forum on Facebook and Google+

  2. #2
    -1
    e^(i*pi)'s Avatar
    Joined
    Feb 2009
    From
    West Midlands, England
    Posts
    3,053
    Thanks
    1
    Quote Originally Posted by pop_91 View Post
    i need to solve this giving and exact solution...

    2e^(x) + 3e^(-x)=7

    thanks
    Let e^x = u<br />

    2u + \frac{3}{u} = 7
    Follow Math Help Forum on Facebook and Google+

  3. #3
    MHF Contributor
    Prove It's Avatar
    Joined
    Aug 2008
    Posts
    11,570
    Thanks
    1428
    Quote Originally Posted by e^(i*pi) View Post
    Let e^x = u<br />

    2u + \frac{3}{u} = 7
    Further hint: Multiply both sides of the equation by u.
    Follow Math Help Forum on Facebook and Google+

  4. #4
    Junior Member
    Joined
    Aug 2008
    From
    England
    Posts
    40
    major thanks guys
    Follow Math Help Forum on Facebook and Google+

Similar Math Help Forum Discussions

  1. Using Exponentials
    Posted in the Differential Geometry Forum
    Replies: 4
    Last Post: February 22nd 2011, 09:11 AM
  2. exponentials
    Posted in the Algebra Forum
    Replies: 3
    Last Post: October 14th 2010, 11:54 AM
  3. exponentials
    Posted in the Advanced Statistics Forum
    Replies: 3
    Last Post: March 7th 2010, 05:34 PM
  4. About exponentials
    Posted in the Pre-Calculus Forum
    Replies: 3
    Last Post: August 16th 2009, 05:46 AM
  5. Exponentials help
    Posted in the Pre-Calculus Forum
    Replies: 1
    Last Post: April 23rd 2009, 04:44 AM

Search Tags


/mathhelpforum @mathhelpforum