Results 1 to 2 of 2

Math Help - Coefficients

  1. #1
    Junior Member
    Joined
    Sep 2008
    Posts
    71

    Coefficients

    Find the equation of the linethrought the y-intercept of x^4-2x^5-11+4x^2and the x-interceptof y=11x-2. Write the coefficients in the form of a simple fraction, if it is necessary.

    *I have no clue what to do. My teacher did not even teach this.
    Follow Math Help Forum on Facebook and Google+

  2. #2
    Junior Member
    Joined
    Nov 2008
    Posts
    47
    Y-intercept means graph is crossing y-axis in this point, and we need to find the coordinates of this point. If this point is on y-axis, the x, first coordinate is 0. Let's plug 0 ; 0^4-2*0^5-11+4*0^2=-11. To find x-intercept, make y=0. 0=11x-2; 11x=2; x=2/11. Now we need to write an equation of a line going through two points A(0,-11) and B(2/11, 0). One way to do it is to find slope first: m= change in y/change in x. m=(0--11)/(2/11-0)=11/(2/11)=121/2=60.5. Now use y=mx+b, and one of points A or B. Let's use p.A, -11=60.5*0+b From this find b, b=-11. Finally the formula of the line going through A and B is y=60.5x-11
    Follow Math Help Forum on Facebook and Google+

Similar Math Help Forum Discussions

  1. Fourier Coefficients?
    Posted in the Differential Geometry Forum
    Replies: 0
    Last Post: May 29th 2010, 08:43 AM
  2. binomial coefficients
    Posted in the Math Topics Forum
    Replies: 2
    Last Post: June 6th 2009, 02:23 AM
  3. Coefficients and Combinations
    Posted in the Discrete Math Forum
    Replies: 1
    Last Post: June 1st 2009, 05:41 AM
  4. Coefficients
    Posted in the Algebra Forum
    Replies: 2
    Last Post: May 14th 2008, 10:38 AM
  5. coefficients
    Posted in the Advanced Algebra Forum
    Replies: 1
    Last Post: May 26th 2005, 07:00 PM

Search Tags


/mathhelpforum @mathhelpforum