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maths help?!

Discussion in 'General Discussion' started by grudas, 9 Jun 2010.

  1. grudas

    Capodecina

    Joined: 12 Mar 2008

    Posts: 21,127

    Location: West sussex

    hey! can anyone help me out with Venn Diagrams? im lost.. basically my teacher said you need to fix it/redo it but did not explain what was wrong.. so this is what i've done so far.. the other part is logic gates which is a part of the whole thing and i might have made a mistake with one of them (AND/OR/NOT)


    http://vstanced.com/datas/users/untitled_1_1.zip


    can anyone who properly understands them check it and tell me if i done it right or not.. i don't want anyone to do it for me just some help would be appreciated.. i need to hand it in tomorrow and it has to be right :eek:
     
  2. Macky

    Soldato

    Joined: 5 Apr 2009

    Posts: 5,816

    Location: England

    Can't you upload a pic instead? Would be much easier; for us. ;)
     
  3. grudas

    Capodecina

    Joined: 12 Mar 2008

    Posts: 21,127

    Location: West sussex

    sure!

    [​IMG]

    halp halp! :O :D
     
  4. touch

    Capodecina

    Joined: 28 Oct 2006

    Posts: 11,763

    Location: Sufferlandria

    I would say:
    AND
    A-B 0,1,7

    OR
    A-B 0,1,2,3,4,6,7
    A-C 0,1,4,5,6,8,9
    B-C 0,1,2,3,5,8,9

    NOT
    A 2,3,5,8,9,10,11,12,13,14,15
    B 4,5,6,8,9,10,11,12,13,14,15
    c 2,3,4,6,7,10,11,12,13,14,15

    only differences i have from you are:
    AND A-B
    OR A-C
    OR B-C
     
  5. frying_pan_cat

    Hitman

    Joined: 6 Nov 2006

    Posts: 728

    Location: Devon

    I can't see anything wrong with the diagram but in part C) shouldn't it be

    A AND B = 0, 1, 7
    A OR B = 0, 1, 2, 3, 4, 6, 7 (you missed the 2)
    A OR C = 0, 1, 4, 5, 6, 7, 8, 9 (you missed the 8)

    And I think the rest are right

    Might wat to wait for someone to confirm though

    EDIT: ^^ Touch I think there should be a 7 in A OR C
     
    Last edited: 9 Jun 2010
  6. whitecrook

    Sgarrista

    Joined: 22 Aug 2005

    Posts: 8,418

    Location: Clydebank

    I don't get this. Can someone explain or point to reference.
     
  7. [FnG]magnolia

    Pancake

    Joined: 29 Aug 2007

    Posts: 27,071

    Location: Auckland

    Intentional comedy? :D
     
  8. grudas

    Capodecina

    Joined: 12 Mar 2008

    Posts: 21,127

    Location: West sussex

    AND
    A-B 0,1,7

    thats the problem with AND as the teacher explained if its in the middle where all the circles meet, it does not need to be showed in a-b(at the diagram) where i have the 7 and he said for me to remove it so i did the same in part C which is what confuses me now.. should i leave 0,1 or remove it?

    @frying_pan_cat - thanks for noting them(a or b - a or c)

    @touch - thanks, i might leave with 0,1 and you missed a 7 on a-c ;)

    got any more ideas about 0,1 on part C?

    thanks for helping out!
     
  9. frying_pan_cat

    Hitman

    Joined: 6 Nov 2006

    Posts: 728

    Location: Devon

    A B and C are subsets of the numbers 0 to 15. The diagram basically has 3 circles to represent A B and C and where they overlap is where they share numbers ie. they all contain 0 and 1 so the space where they all overlap has 0 and 1 in. The next bit is logical AND, OR & NOT, so A AND B is the numbers in both A and B, etc.
     
  10. frying_pan_cat

    Hitman

    Joined: 6 Nov 2006

    Posts: 728

    Location: Devon


    0, 1 should be left in in part C since A AND B are the numbers on both A and B and have nothing to do with C. I think what the teacher is saying is that in the diagram you can't put 0, 1 in the part where just A and B overlap as each number should appear just once in the entire diagram and as 0, 1 are in C too they must therefore be put in the triple overlap.

    I hope that makes sense
     
  11. grudas

    Capodecina

    Joined: 12 Mar 2008

    Posts: 21,127

    Location: West sussex

    it does! thanks a lot! :) finally i figured it out lol..