Results 1 to 2 of 2

Math Help - help with calc what am i doing incorrectly

  1. #1
    Senior Member
    Joined
    Apr 2009
    Posts
    253

    help with calc what am i doing incorrectly

    Find all numbers c that satisfy the conclusion of the mean value theorem.
    f(x)=3x^2+2x+5, [-1,1]

    this is what i get
    f'(c)=\frac{f(b)-f(a)}{b-a}
    a=-1
    b=1
    so
    f'(c)=\frac{f(1)-f(-1)}{1-(-1)}
    = 2

    never mind i figured it out
    well tell me if this is correct
    f'(c)=6c+2
    6c+2=2
    c=0
    Follow Math Help Forum on Facebook and Google+

  2. #2
    MHF Contributor
    Joined
    Aug 2007
    From
    USA
    Posts
    3,111
    Thanks
    2
    Looks good to me. Where were you tripping at first?
    Follow Math Help Forum on Facebook and Google+

Similar Math Help Forum Discussions

  1. Have I been calculating our bills incorrectly?
    Posted in the Business Math Forum
    Replies: 3
    Last Post: November 8th 2011, 06:24 AM
  2. Did I differentiate this incorrectly?
    Posted in the Calculus Forum
    Replies: 1
    Last Post: May 4th 2010, 09:30 PM
  3. Replies: 0
    Last Post: January 14th 2010, 06:45 AM
  4. Replies: 1
    Last Post: January 13th 2010, 12:57 PM
  5. TI-89 Integrating Incorrectly
    Posted in the Calculators Forum
    Replies: 3
    Last Post: September 28th 2008, 03:24 AM

Search Tags


/mathhelpforum @mathhelpforum