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Thread: I think my math lecturer lacks a sense off humour........

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    unknown Georgy291's Avatar
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    I think my math lecturer lacks a sense off humour........

    We got a "quick engeneering math riddle" from him

    basicaly its, solve these simultaneous equasions

    2v + x + y+2z = 10
    2v + 4x + 3y + z = 3
    4v - 4x + 0y +8z = 48
    -2v + 2x + 2y - z = -6

    i worked out the answer and let me assure you, nothing quick about it......

    ...just wondering how long would it take for you hexians to work out the solution?
    lets make a thank to first one with answer

    but post your estimate time, along with your answer
    Quote Originally Posted by MadduckUK View Post
    now that i think about the word "throttled" in a certain light... its not so far different to strangled really

    our boiler broke so we has no heating or hot water, this is the bloody result ^^

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    Re: I think my math lecturer lacks a sense off humour........

    8008135?

    Estimate time - 2 seconds.

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    Re: I think my math lecturer lacks a sense off humour........

    v = 1
    x = -3
    y = 3
    z = 4

    ?

    http://math.bd.psu.edu/~jpp4/finitemath/4x4solver.html

    Where is the humour?

    edit: typed it wrong, i hadn't put the last 6 as -6
    Last edited by TAKTAK; 09-03-2010 at 12:39 AM.
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    DDY
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    Re: I think my math lecturer lacks a sense off humour........

    v=1, x=-3, y=3, z=4

    Ok, 3 secs on my Casio CFX-9850... Does that still count?

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    WEEEEEEEEEEEEE! MadduckUK's Avatar
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    Re: I think my math lecturer lacks a sense off humour........

    Quote Originally Posted by DDY View Post
    v=1, x=-3, y=3, z=4

    Ok, 3 secs on my Casio CFX-9850... Does that still count?
    no because they dont work...
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    Re: I think my math lecturer lacks a sense off humour........

    Its blatently :

    v= 1 x=2 y= 3 z=4

    Or is it...

    v= 1 x=3 y=3 z=7 ?

    I aint done these in ages, ****e at em now so give up .
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    DDY
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    Re: I think my math lecturer lacks a sense off humour........

    Quote Originally Posted by MadduckUK View Post
    no because they dont work...
    The Casios?

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    Re: I think my math lecturer lacks a sense off humour........

    z=4.

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    unknown Georgy291's Avatar
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    Re: I think my math lecturer lacks a sense off humour........

    i got it as v = 1, x = -3 , y = 3 and z = 4

    amusing fact is i also have a calculator that works them out, only york uni doesnt let you take your calculator in to exams, they give us one and i swear its the pound land one to.

    so we have to work this out in our heads.....oh well inverting matricies next
    Quote Originally Posted by MadduckUK View Post
    now that i think about the word "throttled" in a certain light... its not so far different to strangled really

    our boiler broke so we has no heating or hot water, this is the bloody result ^^

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    Re: I think my math lecturer lacks a sense off humour........

    Meh I give up, shoved everything into Excel so I could see how changing each number affects the different formuli, but couldn't get more than 2 different formula's to be right at any one time.

    (\___/) (\___/) (\___/) (\___/) (\___/) (\___/) (\___/)
    (='.'=) (='.'=) (='.'=) (='.'=) (='.'=) (='.'=) (='.'=)
    (")_(") (")_(") (")_(") (")_(") (")_(") (")_(") (")_(")


    This is bunny and friends. He is fed up waiting for everyone to help him out, and decided to help himself instead!

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    Re: I think my math lecturer lacks a sense off humour........

    v=1.

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    Re: I think my math lecturer lacks a sense off humour........

    x=-3

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    Re: I think my math lecturer lacks a sense off humour........

    y=3.

    Pencil and paper. Did I get it right?

    Edit: Yes!


    I promise I didn't cheat by using a calculator or looking at other posts.

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    Pseudo-Mad Scientist Whiternoise's Avatar
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    Re: I think my math lecturer lacks a sense off humour........

    Ech, it's not difficult, but far too tedious! The sort of useless stuff they put into exams, we have optional questions in our maths papers (it's usually pick 4/5) so i'd probably skip it if asked. Give me vector calculus any day!

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    unknown Georgy291's Avatar
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    Re: I think my math lecturer lacks a sense off humour........

    Quote Originally Posted by Whiternoise View Post
    Ech, it's not difficult, but far too tedious! The sort of useless stuff they put into exams, we have optional questions in our maths papers (it's usually pick 4/5) so i'd probably skip it if asked. Give me vector calculus any day!
    i wouldnt skip it, its easy just takes alot of time....all you want in a exam really. Something you can do and will eat up all the exam time
    Quote Originally Posted by MadduckUK View Post
    now that i think about the word "throttled" in a certain light... its not so far different to strangled really

    our boiler broke so we has no heating or hot water, this is the bloody result ^^

  16. #16
    jim
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    Re: I think my math lecturer lacks a sense off humour........

    Isn't that just typical simultaneous equations? Albeit a lot of them Add and subtract the formulae until you want to murder the next person that walks into the room?

    I guess it would probably take 10-15 minutes with a pen and paper but there's no way I want to find out.

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