Results 1 to 8 of 8

Math Help - Finding the limit

  1. October 20th 2009, 06:37 PM #1
    igodspeed
    igodspeed is offline
    Junior Member
    Joined
    Apr 2009
    Posts
    38

    Finding the limit

    Hello,
    This is a question from a past exam. Any help would be appreciated. What does x(t) and y(t) mean here?
    Thanks
    Attached Thumbnails Attached Thumbnails Finding the limit-big-problem.jpg  
    Follow Math Help Forum on Facebook and Google+
  2. October 20th 2009, 06:41 PM #2
    mr fantastic
    mr fantastic is offline
    Flow Master
    mr fantastic's Avatar
    Joined
    Dec 2007
    From
    Zeitgeist
    Posts
    16,948
    Thanks
    5
    Quote Originally Posted by igodspeed View Post
    Hello,
    This is a question from a past exam. Any help would be appreciated. What does x(t) and y(t) mean here?
    Thanks
    x(t) means that x is a function of t. Ditto y(t). They are parametric equations of a curve.
    Last edited by mr fantastic; October 20th 2009 at 07:02 PM.
    Follow Math Help Forum on Facebook and Google+
  3. October 20th 2009, 06:48 PM #3
    igodspeed
    igodspeed is offline
    Junior Member
    Joined
    Apr 2009
    Posts
    38
    If i had to solve just the first part, how would i solve it.
    Last edited by mr fantastic; October 20th 2009 at 07:03 PM.
    Follow Math Help Forum on Facebook and Google+
  4. October 20th 2009, 06:54 PM #4
    mr fantastic
    mr fantastic is offline
    Flow Master
    mr fantastic's Avatar
    Joined
    Dec 2007
    From
    Zeitgeist
    Posts
    16,948
    Thanks
    5
    Quote Originally Posted by igodspeed View Post
    I don't get why did you say it is wrong? If i had to solve just this, how would i solve it.
    Substitute y = mx and try taking the limit as x approaches 0.
    Last edited by mr fantastic; October 20th 2009 at 07:08 PM.
    Follow Math Help Forum on Facebook and Google+
  5. October 20th 2009, 06:58 PM #5
    igodspeed
    igodspeed is offline
    Junior Member
    Joined
    Apr 2009
    Posts
    38
    What i did was i substituted y for x and so i got x to the power of 4 and on the bottom i have x squared and x to 6 then when i find the limit, the ans is zero. is this wrong? then on the second one i did the same for y as x=y.
    Follow Math Help Forum on Facebook and Google+
  6. October 20th 2009, 07:02 PM #6
    mr fantastic
    mr fantastic is offline
    Flow Master
    mr fantastic's Avatar
    Joined
    Dec 2007
    From
    Zeitgeist
    Posts
    16,948
    Thanks
    5
    Quote Originally Posted by igodspeed View Post
    perhaps. But what i did was i substituted y for x and so i got x to the power of 4 and on the bottom i have x squared and x to 6 then when i find the limit, the ans is zero. is this wrong? then on the second one i did the same for y as x=y.
    The question says for ALL lines passing through the origin. You did it for exactly two such lines.
    Last edited by mr fantastic; October 20th 2009 at 08:50 PM.
    Follow Math Help Forum on Facebook and Google+
  7. October 20th 2009, 08:28 PM #7
    igodspeed
    igodspeed is offline
    Junior Member
    Joined
    Apr 2009
    Posts
    38
    ok i solved it. now i got the value for m and n so could can i write it parametically? 2rd question?
    Attached Thumbnails Attached Thumbnails Finding the limit-problem.jpg  
    Last edited by igodspeed; October 20th 2009 at 08:39 PM.
    Follow Math Help Forum on Facebook and Google+
  8. October 20th 2009, 08:54 PM #8
    mr fantastic
    mr fantastic is offline
    Flow Master
    mr fantastic's Avatar
    Joined
    Dec 2007
    From
    Zeitgeist
    Posts
    16,948
    Thanks
    5
    Quote Originally Posted by igodspeed View Post
    ok i solved it. now i got the value for m and n so could can i write it parametically? 2rd question?
    What have you done? Have you substituted the expressions for x and y into the function? Simplified? etc.

    Please show all your work and say where you get stuck.
    Follow Math Help Forum on Facebook and Google+
« Disk and Shell method | help re-arranging a complex formula »

Similar Math Help Forum Discussions

  1. Finding the limit
    Posted in the Calculus Forum
    Replies: 4
    Last Post: October 11th 2011, 08:50 AM
  2. Finding limit of this function, using Limit rules
    Posted in the Pre-Calculus Forum
    Replies: 3
    Last Post: February 27th 2011, 02:12 PM
  3. [SOLVED] Finding f(x) and g(x) - limit
    Posted in the Calculus Forum
    Replies: 7
    Last Post: December 18th 2010, 05:32 AM
  4. Finding a limit. Finding Maclaurin series.
    Posted in the Calculus Forum
    Replies: 2
    Last Post: May 18th 2010, 11:04 PM
  5. help finding the following limit:
    Posted in the Calculus Forum
    Replies: 1
    Last Post: February 15th 2008, 10:25 PM

Search Tags


/mathhelpforum @mathhelpforum