Results 1 to 3 of 3

Thread: solving differential equations

  1. May 10th 2010, 08:38 PM #1
    cron1003
    cron1003 is offline
    Newbie
    Joined
    Apr 2010
    Posts
    5

    solving differential equations

    Please help me..


    dy + 7x dx = 0

    Given y(0)=3
    Last edited by cron1003; May 10th 2010 at 10:23 PM.
    Follow Math Help Forum on Facebook and Google+
  2. May 10th 2010, 08:51 PM #2
    dwsmith
    dwsmith is offline
    MHF Contributor
    Joined
    Mar 2010
    From
    Florida
    Posts
    3,093
    Thanks
    4
    Quote Originally Posted by cron1003 View Post
    Please help me..


    dy + 7x dx = 0

    assume dy(0)=3
    Separable equation.

    dy(0)=3 or y(0)=3?

    dy=-7xdx\rightarrow\int dy=-7\int xdx\rightarrow y=\frac{-7x^2}{2}+C_1

    If you mean y(0)=3, then C=3.

    y=\frac{-7x^2}{2}+3
    Follow Math Help Forum on Facebook and Google+
  3. May 10th 2010, 10:21 PM #3
    cron1003
    cron1003 is offline
    Newbie
    Joined
    Apr 2010
    Posts
    5
    Ops! you are correct.

    given y(0) = 3. this is correct..

    sorry for my mistake.
    Follow Math Help Forum on Facebook and Google+
« Minimisation problem. | find the length of the curve over the interval »

Similar Math Help Forum Discussions

  1. Solving differential equations..help!
    Posted in the Calculus Forum
    Replies: 1
    Last Post: March 28th 2010, 04:02 PM
  2. Solving Differential Equations!
    Posted in the Calculus Forum
    Replies: 1
    Last Post: April 22nd 2009, 07:34 PM
  3. Solving differential equations
    Posted in the Calculus Forum
    Replies: 1
    Last Post: November 10th 2008, 10:36 AM
  4. Help on solving differential equations...
    Posted in the Calculus Forum
    Replies: 3
    Last Post: October 19th 2008, 03:46 PM
  5. Help on solving differential equations...
    Posted in the Differential Equations Forum
    Replies: 4
    Last Post: October 19th 2008, 03:14 PM

Search Tags


/mathhelpforum @mathhelpforum