Results 1 to 3 of 3

Math Help - horizontal compressions on reciprocal functions

  1. #1
    Newbie
    Joined
    Apr 2010
    Posts
    1

    Question horizontal compressions on reciprocal functions

    if you have the function y=1/x
    how do you rewrite the equation with a horizontal compression of 1/2 ?
    i know that b=2, but where do i put it?
    Follow Math Help Forum on Facebook and Google+

  2. #2
    MHF Contributor

    Joined
    Apr 2005
    Posts
    15,579
    Thanks
    1418
    To "compress" a function horizontally by 1/2 just multiply the function by 1/2:
    y= (1/2)(1/x)= 1/(2x)
    Follow Math Help Forum on Facebook and Google+

  3. #3
    Member mathemagister's Avatar
    Joined
    Feb 2010
    Posts
    191
    Quote Originally Posted by monstamash View Post
    if you have the function y=1/x
    how do you rewrite the equation with a horizontal compression of 1/2 ?
    i know that b=2, but where do i put it?
    The "b" you are looking for is always the coefficient of x. However, using a logical method like HOI pointed out is, at least in my opinion, more logical and easier to think through.
    Last edited by mathemagister; April 11th 2010 at 04:50 AM.
    Follow Math Help Forum on Facebook and Google+

Similar Math Help Forum Discussions

  1. Rational and Reciprocal Functions
    Posted in the Algebra Forum
    Replies: 0
    Last Post: October 22nd 2011, 05:50 PM
  2. Horizontal and vertical shifts of functions
    Posted in the Trigonometry Forum
    Replies: 4
    Last Post: August 10th 2011, 04:53 PM
  3. Replies: 1
    Last Post: May 6th 2010, 02:23 AM
  4. reciprocal functions question
    Posted in the Trigonometry Forum
    Replies: 2
    Last Post: December 30th 2009, 08:18 AM
  5. Derivative of reciprocal functions
    Posted in the Calculus Forum
    Replies: 3
    Last Post: June 4th 2008, 02:21 PM

Search Tags


/mathhelpforum @mathhelpforum