Results 1 to 2 of 2

Math Help - Determining x-intercepts of a curve

  1. #1
    Newbie
    Joined
    Mar 2009
    Posts
    23

    Determining x-intercepts of a curve

    Hey guys and gals.

    I was wondering if I could get some help with a question that reads.

    Determine the x-intercepts of the curve which has a slope 2x +1 and passes through (1, -4)

    Thank You so much!
    Follow Math Help Forum on Facebook and Google+

  2. #2
    MHF Contributor
    Prove It's Avatar
    Joined
    Aug 2008
    Posts
    11,409
    Thanks
    1294
    Quote Originally Posted by Meeklo Braca View Post
    Hey guys and gals.

    I was wondering if I could get some help with a question that reads.

    Determine the x-intercepts of the curve which has a slope 2x +1 and passes through (1, -4)

    Thank You so much!
    If it has a slope of 2x + 1 then we can say

    \frac{dy}{dx} = 2x + 1.

    Therefore

    y = \int{2x + 1\,dx}

    y = x^2 + x + C.


    We're told that (1, -4) lies on the curve, so

    -4 = 1^2 + 1 + C

    -4 = 1 + 1 + C

    -4 = 2 + C

    -6 = C.


    Thus y = x^2 + x - 6.
    Follow Math Help Forum on Facebook and Google+

Similar Math Help Forum Discussions

  1. Replies: 2
    Last Post: March 9th 2011, 02:34 AM
  2. Determining logistic curve
    Posted in the Advanced Statistics Forum
    Replies: 0
    Last Post: December 1st 2010, 07:18 PM
  3. Addition of Intercepts for curve
    Posted in the Calculus Forum
    Replies: 2
    Last Post: April 26th 2010, 04:51 PM
  4. Determining the function of a curve
    Posted in the Calculus Forum
    Replies: 0
    Last Post: November 1st 2009, 05:33 AM
  5. how do i find both x intercepts of a curve?
    Posted in the Calculus Forum
    Replies: 1
    Last Post: November 17th 2008, 11:23 AM

Search Tags


/mathhelpforum @mathhelpforum