Results 1 to 3 of 3

Math Help - Make x the subject

  1. #1
    Newbie
    Joined
    Mar 2012
    From
    Chester Hill
    Posts
    1

    Make x the subject

    y=2^x

    y=3
    √(1-2x)full working out and answer please
    Last edited by darrenn6; March 5th 2012 at 10:19 PM.
    Follow Math Help Forum on Facebook and Google+

  2. #2
    Master Of Puppets
    pickslides's Avatar
    Joined
    Sep 2008
    From
    Melbourne
    Posts
    5,236
    Thanks
    29

    Re: Make x the subject

    Quote Originally Posted by darrenn6 View Post
    y=2^x
    Take \log_2 to both sides

    Quote Originally Posted by darrenn6 View Post

    y=3
    √(1-2x)full working out and answer please

    Start by squaring both sides.
    Follow Math Help Forum on Facebook and Google+

  3. #3
    MHF Contributor
    Joined
    Dec 2007
    From
    Ottawa, Canada
    Posts
    3,173
    Thanks
    74

    Re: Make x the subject

    Quote Originally Posted by darrenn6 View Post
    y=3 √(1-2x)
    y - 3 = +-SQRT(1 - 2x)
    square both sides:
    y^2 - 6y + 9 = 1 - 2x
    Continue...
    Follow Math Help Forum on Facebook and Google+

Similar Math Help Forum Discussions

  1. Trying to make (x) the subject?
    Posted in the Algebra Forum
    Replies: 1
    Last Post: July 21st 2011, 03:31 PM
  2. V=B-q/k In(r-1): Make r the subject.
    Posted in the Algebra Forum
    Replies: 5
    Last Post: October 7th 2010, 05:21 AM
  3. make L subject
    Posted in the Algebra Forum
    Replies: 3
    Last Post: November 29th 2009, 03:54 PM
  4. make y the subject 4x+3y+15
    Posted in the Algebra Forum
    Replies: 4
    Last Post: April 30th 2009, 10:21 AM
  5. Help make x the subject
    Posted in the Algebra Forum
    Replies: 2
    Last Post: April 27th 2008, 09:21 AM

Search Tags


/mathhelpforum @mathhelpforum