Results 1 to 2 of 2

Math Help - If the reciprocal of x+1 is...

  1. #1
    Member
    Joined
    Sep 2006
    Posts
    75

    If the reciprocal of x+1 is...

    If the reciprocal of x+1 is x-1 determine x.
    Follow Math Help Forum on Facebook and Google+

  2. #2
    Super Member

    Joined
    May 2006
    From
    Lexington, MA (USA)
    Posts
    11,676
    Thanks
    608
    Hello, ceasar_19134!

    If the reciprocal of x + 1 is x - 1, determine x

    . . . . . . . . . . . . . . .1
    The equation is: . ------- .= . x - 1
    . . . . . . . . . . . . . x + 1

    Assuming x ≠ -1, multiply both sides by (x + 1): . 1 .= .(x + 1)(x - 1)

    - - . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ._
    And we have: . x - 1 .= .1 . . x .= .2 . . x .= .√2

    Follow Math Help Forum on Facebook and Google+

Similar Math Help Forum Discussions

  1. Sum of Reciprocal of primes
    Posted in the Number Theory Forum
    Replies: 3
    Last Post: June 3rd 2011, 07:07 AM
  2. reciprocal
    Posted in the Math Topics Forum
    Replies: 2
    Last Post: February 5th 2010, 09:11 AM
  3. reciprocal cm?
    Posted in the Calculus Forum
    Replies: 2
    Last Post: November 2nd 2009, 01:54 AM
  4. multiply by reciprocal
    Posted in the Algebra Forum
    Replies: 1
    Last Post: November 28th 2008, 09:49 AM
  5. reciprocal
    Posted in the Algebra Forum
    Replies: 1
    Last Post: September 22nd 2008, 03:47 PM

Search Tags


/mathhelpforum @mathhelpforum