Results 1 to 2 of 2

Math Help - the only real root of the equation

  1. #1
    Member
    Joined
    Nov 2006
    Posts
    152

    the only real root of the equation

    Prove that the only real root of the equation  x^7-14x^6+21x^5-70x^4+35x^3-42x^2+7x-2=0 is .
    Follow Math Help Forum on Facebook and Google+

  2. #2
    Forum Admin topsquark's Avatar
    Joined
    Jan 2006
    From
    Wellsville, NY
    Posts
    9,856
    Thanks
    321
    Awards
    1
    Quote Originally Posted by perash View Post
    Prove that the only real root of the equation  x^7-14x^6+21x^5-70x^4+35x^3-42x^2+7x-2=0 is .
    Well, the easy way out is to graph it, showing that there is only one real solution, then plug the target value of x into the equation and verify that it is a solution. (It'll be a real monster of an expansion, I'm sure! )

    But that's probably not what you are looking for.

    -Dan
    Follow Math Help Forum on Facebook and Google+

Similar Math Help Forum Discussions

  1. Probability of at least one real root
    Posted in the Statistics Forum
    Replies: 3
    Last Post: April 19th 2011, 09:16 AM
  2. Replies: 9
    Last Post: September 20th 2009, 06:25 PM
  3. prove that this equation has 1 real root
    Posted in the Calculus Forum
    Replies: 3
    Last Post: June 15th 2008, 08:07 AM
  4. show equation has exactly one real root
    Posted in the Calculus Forum
    Replies: 1
    Last Post: May 10th 2008, 08:29 PM
  5. Replies: 1
    Last Post: March 21st 2008, 04:17 AM

Search Tags


/mathhelpforum @mathhelpforum