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Thread: Cant get the same answer as my lecturer

  1. #1

    Cant get the same answer as my lecturer

    Slide1.jpgSlide2.jpg

    Hi

    So I have uploaded two slides from my lecture. The problem I am having is getting to equation 5 from 4. He says I need to put equation 4 into 1, which I do and get L=MIN.E(equation4). Then you take the first derivative of that with respect to m. So dL/dm= ??? I think I am taking this derivative wrong. However the next step is to solve for m and then you should get the answer he has in 5.

    Any help would be appreciated thanks

  2. #2
    Elite Member
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    Quote Originally Posted by strachan1992 View Post
    Slide1.jpgSlide2.jpg

    Hi

    So I have uploaded two slides from my lecture. The problem I am having is getting to equation 5 from 4. He says I need to put equation 4 into 1, which I do and get L=MIN.E(equation4). Then you take the first derivative of that with respect to m. So dL/dm= ??? I think I am taking this derivative wrong. However the next step is to solve for m and then you should get the answer he has in 5.

    Any help would be appreciated thanks
    Slide1.jpgSlide2.jpg

    I have not worked it out with pencil/paper - but looks like simple algebraic manipulation.

    Starting with equation (4) - multiply both sides by by (a+c)

    Now work with right hand side - expand by distributing and isolate mt

    Tell/show us what you get.....
    “... mathematics is only the art of saying the same thing in different words” - B. Russell

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