Results 1 to 3 of 3

Math Help - Radicals

  1. #1
    Newbie
    Joined
    Aug 2008
    Posts
    1

    Radicals

    Solve the equation w=Cr^-2. Solve for r
    Follow Math Help Forum on Facebook and Google+

  2. #2
    Senior Member nikhil's Avatar
    Joined
    Jun 2008
    Posts
    286
    Quote Originally Posted by broncosfan1 View Post
    Solve the equation w=Cr^-2. Solve for r
    w=Cr^-2
    r^-2=w/c
    r^2=c/w
    r=+-(c/w)^(1/2) [that is plus minus square root of c/w]
    Follow Math Help Forum on Facebook and Google+

  3. #3
    Super Member
    Joined
    Sep 2007
    Posts
    528
    Awards
    1
    Quote Originally Posted by broncosfan1 View Post
    Solve the equation w=Cr^-2. Solve for r
    w=Cr^{-2}

    This is equivalent to:

    w= \frac{C}{r^2}

    Multiply both sides by r^2:

    wr^2 = C

    Divide both sides by w:

    r^2 = \frac{C}{w}

    Square root both sides:

    r = \pm\sqrt{\frac{C}{w}}
    Follow Math Help Forum on Facebook and Google+

Similar Math Help Forum Discussions

  1. help with radicals
    Posted in the Algebra Forum
    Replies: 4
    Last Post: May 4th 2010, 07:49 AM
  2. Radicals
    Posted in the Algebra Forum
    Replies: 6
    Last Post: January 27th 2010, 06:26 AM
  3. Help with radicals :(
    Posted in the Algebra Forum
    Replies: 2
    Last Post: December 2nd 2009, 08:20 PM
  4. Radicals
    Posted in the Algebra Forum
    Replies: 5
    Last Post: April 23rd 2009, 05:19 AM
  5. Radicals
    Posted in the Algebra Forum
    Replies: 1
    Last Post: October 17th 2007, 08:24 AM

Search Tags


/mathhelpforum @mathhelpforum