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Math Help - Mathcad

  1. #1
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    Mathcad

    Anyone here any good at it, im trying to plot a graph from a function, ive put everything on the page but nothing appears on the graph.

    pm me if you can help thanks
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  2. #2
    MHF Contributor

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    Quote Originally Posted by bangor_boy View Post
    Anyone here any good at it, im trying to plot a graph from a function, ive put everything on the page but nothing appears on the graph.
    Post details of the question or project.
    We can not help if we don't know the details.
    BTW: I for one will not deal with work by PM's.
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  3. #3
    Newbie
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    A tent-shaped shelter has a ridged roof of length 3 metres and a horizontal rectangular floor of length x metres. Each end of the shelter is an isosceles triangle of slant side length 2 metres and base length 1 metre. The shelter, shown in the diagram below, is symmetric about vertical planes through the centre of the rectangular floor and parallel to its sides. The value of x is between 0 and 3
    + sqrt 15
    . (The shelter cannot exist for other values of
    x.)


    The total volume
    V (x)m3 of the shelter is given by
    V
    (x)= 1 /12 (2x +3)
    15
    (x 3)2 (0 x 3+ 15).
    (You are
    not asked to derive this formula.)
    For parts (a) and (b) (and for part (c), if you use Mathcad there) you
    should provide a printout annotated with enough explanation to make it
    clear what you have done.
    NB:Ifyou define
    x to be a range variable in part (a) and wish to use x in
    a symbolic calculation in part (b), then you will need to insert the
    definition
    x := x between the two parts in your worksheet.
    (a) Use Mathcad to obtain the graph of the function
    V (x).
    (b) This part of the question requires the use of Mathcad in each sub-part.
    (i) By using the differentiation facility and the symbolic keyword
    ‘simplify’, find an expression for the derivative
    V (x).
    (ii) By either applying a solve block or solving symbolically, find a
    value of
    x for which V (x)= 0.
    (iii) Verify, by the Second Derivative Test, that this value of
    x
    corresponds to a local maximum of
    V (x). (It should be apparent
    from the graph obtained in part (a) that this is also an overall
    maximum within the domain of
    V (x).)
    (c) Using Mathcad, or otherwise, find the maximum possible volume of
    the shelter, according to the model.


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  4. #4
    Junior Member
    Joined
    Dec 2009
    Posts
    28

    Smile

    I'm interested in seeing a solution to this as I've just obtained a copy of Mathcad, can anyone take this any further please?

    Thanks
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