Results 1 to 2 of 2

Math Help - Derivatives

  1. #1
    Junior Member Fnus's Avatar
    Joined
    Nov 2006
    Posts
    48

    Derivatives

    I'm at such a loss.
    In exercise 4 I don't even know where to being, and in exercise 9 the x=a confuses me.
    Thanks in advance
    Attached Thumbnails Attached Thumbnails Derivatives-1.jpg   Derivatives-2.jpg  
    Follow Math Help Forum on Facebook and Google+

  2. #2
    Member
    Joined
    Aug 2007
    Posts
    144
    4a) We have 2x+y=6; x=1 \implies y=4
    Also we know the gradient; m=-2
    Differentiate y=x^2+ax+b

    \implies \frac {dy}{dx} = 2x+a

    \implies 2x+a=-2

    x=1; 2(-1)+a=-2

    \implies a=0

    \implies y=x^2+b

    x=1, y=-4; -4=1^2+b

    \implies b=-5

    b is similar so ill let you try.
    Follow Math Help Forum on Facebook and Google+

Similar Math Help Forum Discussions

  1. Derivatives and Anti-Derivatives
    Posted in the Calculus Forum
    Replies: 7
    Last Post: February 6th 2011, 07:21 AM
  2. Replies: 1
    Last Post: July 19th 2010, 05:09 PM
  3. Derivatives with both a and y
    Posted in the Calculus Forum
    Replies: 3
    Last Post: October 4th 2009, 10:17 AM
  4. Replies: 4
    Last Post: February 10th 2009, 10:54 PM
  5. Trig derivatives/anti-derivatives
    Posted in the Calculus Forum
    Replies: 1
    Last Post: February 10th 2009, 02:34 PM

Search Tags


/mathhelpforum @mathhelpforum