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1E2 Exam

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  • 11-03-2006 1:21pm
    #1
    Sandals
    Closed Accounts Posts: 1,299 ✭✭✭


    Anyone else sitting it?
    any tips?
    any one have a copy os last years solutions?
    anyone have any links to Vectors notes, it is there that my problems lie.


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    #2
    Boston
    Closed Accounts Posts: 17,163 ✭✭✭✭Boston


    Go to the maths help sessions.

    wrt vectors, as I recall the "least squares" vector thing comes up every year, and in the supllimentals, and is exactly the same as what donal did in class.


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    #3
    Sandals
    Closed Accounts Posts: 1,299 ✭✭✭Sandals


    thanks, yeah I can do that one it looks pretty handy, don't get some of the simpler vector stuff though like,
    how do you find a vector perpendicular/parallel to a given vector.

    I can do the projections all right,

    I won't be able to make that session, theres only one right?


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    #4
    patzer117
    Closed Accounts Posts: 288 ✭✭patzer117


    I think he's staying back a little later after the help session for questions cause MSISS have an exam at that time too. Do you know what chapters in the book are covered cause I need to study the book properly too.

    Patzer


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    #5
    Sandals
    Closed Accounts Posts: 1,299 ✭✭✭Sandals


    ouch that sucks, so you have 3 exams that day?

    no I don't have the book!

    DO you know how much q's will be on the exam i am hoping for 2 prob 2 logic and 1 vectors


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    #6
    Boston
    Closed Accounts Posts: 17,163 ✭✭✭✭Boston


    When i was in first year, there where two maths help sessions a week, durign lunch break.

    As for the book
    Chapters 1-4, Some parts of Chapter 6, chapet 7, and parts of chapter 9.
    As always courses change every year, Between first and second year you cover pretty much the whole book, so some topics may have been added since I did the course.

    As for finding a perpendicular (orthogonal) vector, its the cross product of two vectors.

    Now if you're asked a question like U = (a1,b1,c1) z = (a2,b2,c3) find a vector orthogonal to z, it's just U - Proj of U onto z.

    Ps, get the book (Anton) Donal follows it very closely.


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    #7
    patzer117
    Closed Accounts Posts: 288 ✭✭patzer117


    Thanks Liouville, that's my reading for tomorrow then. 3 exams monday is a bit of a pain alright. The economics isn't too bad, but you have to study for it still which takes valuable time away from maths... Maths 1 hopefully will be a walk in the park (I say that without having looked at what is involved)


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    #8
    Gileadi
    Registered Users Posts: 1,126 ✭✭✭Gileadi


    dont forget that we did LU decomposition after xmas alwell and he was pretty clear when me and a friend asked him if it was on the exam that everything after xmas should be coming up


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    #9
    Sandals
    Closed Accounts Posts: 1,299 ✭✭✭Sandals


    what a brutal paper, brutal.


    what the hell is PLU?
    why did i get them all wrong?


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    #10
    europerson
    Registered Users Posts: 2,909 ✭✭✭europerson


    Sandals wrote:
    what the hell is PLU?
    I'm guessing P is a permutation matrix, L is the lower triangular matrix and U is the upper triangular matrix...?


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    #11
    patzer117
    Closed Accounts Posts: 288 ✭✭patzer117


    Sandals wrote:
    what a brutal paper, brutal.


    what the hell is PLU?
    why did i get them all wrong?

    LOL, I messed up the LU bit and didn't even attempt PLU. Discrete maths didn't work for me, and i got a really strange answer for the orthogonal thingy. Probability was a sinch though. I reckon 30-35%, a pass if i'm lucky. Ugh.


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    #12
    Boston
    Closed Accounts Posts: 17,163 ✭✭✭✭Boston


    End of year exam can count for 100% of you're final mark, if thats your better grade.


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