Results 1 to 8 of 8

Math Help - quotient rule

  1. #1
    Member
    Joined
    Jul 2008
    Posts
    128
    Awards
    1

    quotient rule

    [/IMG]i know how to derive when using the quotient rule but what about this one?

    Follow Math Help Forum on Facebook and Google+

  2. #2
    Master Of Puppets
    pickslides's Avatar
    Joined
    Sep 2008
    From
    Melbourne
    Posts
    5,234
    Thanks
    27
    \displaystyle y= \frac{3}{5r+11}\implies y' = \frac{(5r+11)\times (3)'-(5r+11)'(3)}{(5r+11)^2}
    Follow Math Help Forum on Facebook and Google+

  3. #3
    Member
    Joined
    Jul 2008
    Posts
    128
    Awards
    1
    thanks for the answer could you please explain the steps reasoning so i can get it.
    Follow Math Help Forum on Facebook and Google+

  4. #4
    Master Of Puppets
    pickslides's Avatar
    Joined
    Sep 2008
    From
    Melbourne
    Posts
    5,234
    Thanks
    27
    Yep, I can,

    The quotient rule

    \displaystyle y= \frac{u}{v}\implies y' = \frac{vu'-v'u}{v^2}

    Or you can say

    \displaystyle y= \frac{3}{5r+11} = 3(5r+11)^{-1}

    then use the chain rule.
    Follow Math Help Forum on Facebook and Google+

  5. #5
    Member
    Joined
    Jul 2008
    Posts
    128
    Awards
    1
    thank you very much i now see how you did it thanks a bunch
    Follow Math Help Forum on Facebook and Google+

  6. #6
    MHF Contributor
    Prove It's Avatar
    Joined
    Aug 2008
    Posts
    10,969
    Thanks
    1010
    By the way, seeing as this is clearly a Calculus question, why have you posted it in Pre-Calculus?
    Follow Math Help Forum on Facebook and Google+

  7. #7
    Member
    Joined
    Jul 2008
    Posts
    128
    Awards
    1
    I thought only university questions could go there?

    if that's wrong how do i move the thread?
    Follow Math Help Forum on Facebook and Google+

  8. #8
    A Plied Mathematician
    Joined
    Jun 2010
    From
    CT, USA
    Posts
    6,318
    Thanks
    4
    Awards
    2
    To move the thread, report your own post using the Report Post tool at the lower left corner of the OP. Looks like a triangle with an exclamation mark inside it. A mod will move it for you.
    Follow Math Help Forum on Facebook and Google+

Similar Math Help Forum Discussions

  1. Replies: 5
    Last Post: December 20th 2011, 04:57 AM
  2. Proof for Product Rule and Quotient Rule
    Posted in the Pre-Calculus Forum
    Replies: 4
    Last Post: August 24th 2010, 01:35 AM
  3. quotient rule
    Posted in the Calculus Forum
    Replies: 3
    Last Post: April 15th 2010, 06:26 AM
  4. Quotient rule with Sin & Cos
    Posted in the Calculus Forum
    Replies: 1
    Last Post: October 14th 2009, 07:27 PM
  5. The Quotient Rule
    Posted in the Calculus Forum
    Replies: 1
    Last Post: June 11th 2008, 05:33 PM

Search Tags


/mathhelpforum @mathhelpforum