Page 2 of 2 FirstFirst 12
Results 16 to 21 of 21

Math Help - General differentiation questions

  1. #16
    is up to his old tricks again! Jhevon's Avatar
    Joined
    Feb 2007
    From
    New York, USA
    Posts
    11,663
    Thanks
    3
    Quote Originally Posted by Apex View Post
    Hi

    I carried with Q9 but got stuck. See Q9 below.

    Thanks alot
    Apex
    so set the other part equal to zero and solve.

    \sin x + \frac {x \cos x }2 = 0 has solutions
    Follow Math Help Forum on Facebook and Google+

  2. #17
    is up to his old tricks again! Jhevon's Avatar
    Joined
    Feb 2007
    From
    New York, USA
    Posts
    11,663
    Thanks
    3
    Quote Originally Posted by Apex View Post
    This one requires more of an explanation
    the derivative went from a negative value to a positive value on a continuous, smooth curve, it means the derivative had to hit zero at some point in that interval. when the derivative is zero, we have a stationary point
    Follow Math Help Forum on Facebook and Google+

  3. #18
    is up to his old tricks again! Jhevon's Avatar
    Joined
    Feb 2007
    From
    New York, USA
    Posts
    11,663
    Thanks
    3
    Quote Originally Posted by Apex View Post
    Stuck on solving this....
    first thing's first, your derivative here is incorrect. fix it
    Follow Math Help Forum on Facebook and Google+

  4. #19
    is up to his old tricks again! Jhevon's Avatar
    Joined
    Feb 2007
    From
    New York, USA
    Posts
    11,663
    Thanks
    3
    Quote Originally Posted by Apex View Post
    I don't understand what this means.
    just find the x-value for A, which you can do, you know how to find the local minimum point of a function. then just plug in the x-value into g(x) to show that you get the desired result. that is, if x_1 is the x-value for the point A, show that g(x_1) = x by plugging it in
    Follow Math Help Forum on Facebook and Google+

  5. #20
    is up to his old tricks again! Jhevon's Avatar
    Joined
    Feb 2007
    From
    New York, USA
    Posts
    11,663
    Thanks
    3
    Quote Originally Posted by Apex View Post
    bump
    bumping is against the rules. ad you should post new questions in a new thread
    Follow Math Help Forum on Facebook and Google+

  6. #21
    Junior Member
    Joined
    Apr 2007
    Posts
    40
    Hi

    These aren't new questions, and they're on the same topic. They're the final questions in the chapter, and I posted them the same day you replied to the other q. Never mind.
    Follow Math Help Forum on Facebook and Google+

Page 2 of 2 FirstFirst 12

Similar Math Help Forum Discussions

  1. General Combination Questions
    Posted in the Discrete Math Forum
    Replies: 2
    Last Post: May 16th 2010, 09:47 PM
  2. General TI85 Questions
    Posted in the Calculators Forum
    Replies: 0
    Last Post: October 16th 2008, 09:19 PM
  3. PDE - a few general questions
    Posted in the Calculus Forum
    Replies: 2
    Last Post: January 29th 2008, 02:25 AM
  4. Some more general questions..
    Posted in the Math Topics Forum
    Replies: 9
    Last Post: July 18th 2006, 04:33 PM
  5. A few general questions and inquiries
    Posted in the Math Topics Forum
    Replies: 13
    Last Post: July 15th 2006, 04:36 PM

Search Tags


/mathhelpforum @mathhelpforum