Page 47 of 47 FirstFirst ... 22 37 38 39 40 41 42 43 44 45 46 47
Results 921 to 931 of 931

Thread: Need help with science/math schoolwork? Post here!

  1. #921
    chriscase's Avatar Civitate
    Join Date
    Mar 2008
    Posts
    3,962

    Default Re: Need help with science/math schoolwork? Post here!

    So you are using a relational DB and you want to associate multiple names to a given identity. What is the requirement to store multiple names coming from? Why not just pick one?

  2. #922
    edse's Avatar Pili Prior
    Join Date
    Jun 2011
    Location
    Finland
    Posts
    2,220

    Default Re: Need help with science/math schoolwork? Post here!

    My mother for example have had three different last names; a maiden name, a name from first marriage and a name from second marriage. It's useful to store all three, since if one want to find out more about her childhood and ancestry, her maiden name is needed. Some information can be find if one searches on her name from the first marriage. Her third name is what will be carried on and is also the name that most know her as.

    I could pick one, that is true, but I feel like there is a lot of interesting data that goes missing. I don't know.

  3. #923
    chriscase's Avatar Civitate
    Join Date
    Mar 2008
    Posts
    3,962

    Default Re: Need help with science/math schoolwork? Post here!

    So wait, is this for geneology?

  4. #924
    edse's Avatar Pili Prior
    Join Date
    Jun 2011
    Location
    Finland
    Posts
    2,220

    Default Re: Need help with science/math schoolwork? Post here!

    Yes, I did say it somewhere

  5. #925
    chriscase's Avatar Civitate
    Join Date
    Mar 2008
    Posts
    3,962

    Default Re: Need help with science/math schoolwork? Post here!

    Ok, sorry for the confusion.

    So the basic methodology would be first to look for a published standard information model. I believe GEDCOM is the de facto standard. Then you'd investigate whether there are any reference relational models that implement the standard, or, if you have a mind to try your hand at it, try to write your own. I usually split the difference by trying out a few reference implementations and then modify or roll my own.

  6. #926
    Finlander's Avatar Ragnarök Is Coming
    Content Director Citizen

    Join Date
    Jun 2009
    Location
    In the North
    Posts
    3,989

    Default Re: Need help with science/math schoolwork? Post here!

    Does anyone here know how to solve this and put it in a simple form?

    Click image for larger version. 

Name:	math01.png 
Views:	25 
Size:	4.3 KB 
ID:	314154


    Edit. Is it just x * y^2? Just played a bit with the numbers.
    Last edited by Finlander; September 17, 2014 at 06:43 AM.

  7. #927
    edse's Avatar Pili Prior
    Join Date
    Jun 2011
    Location
    Finland
    Posts
    2,220

    Default Re: Need help with science/math schoolwork? Post here!

    I believe you got it just a little bit wrong. I begin from the x in the middle.
    (x-8/3)3=x(-8/3)*3=x-8 so you have x-8y8 under the root. The fourth root(?) of this is x-8*(1/4)y8*(1/4)=x-2y2. Now x2*x-2*y2=x2+(-2)*y2=y2

  8. #928
    Finlander's Avatar Ragnarök Is Coming
    Content Director Citizen

    Join Date
    Jun 2009
    Location
    In the North
    Posts
    3,989

    Default Re: Need help with science/math schoolwork? Post here!

    Thanks edge! However, I am a bit confused right now here: shouldn't x2+(-2) be x0= 1x?

  9. #929
    polymorphic's Avatar Miles
    Join Date
    May 2014
    Location
    Greece
    Posts
    148

    Default Re: Need help with science/math schoolwork? Post here!

    Quote Originally Posted by Finlander View Post
    Thanks edge! However, I am a bit confused right now here: shouldn't x2+(-2) be x0= 1x?
    No x0=1 even if x=o

  10. #930
    Finlander's Avatar Ragnarök Is Coming
    Content Director Citizen

    Join Date
    Jun 2009
    Location
    In the North
    Posts
    3,989

    Default Re: Need help with science/math schoolwork? Post here!

    Alright I see it now, thanks!

  11. #931
    Nikitn's Avatar Centurio Primus Ordine
    Join Date
    Nov 2007
    Posts
    7,199

    Default Re: Need help with science/math schoolwork? Post here!

    Quote Originally Posted by Finlander View Post
    Thanks edge! However, I am a bit confused right now here: shouldn't x2+(-2) be x0= 1x?
    No. The exponential of x defines the order of x. So:
    1x = x = x1 ≠ x0 = 1.

Page 47 of 47 FirstFirst ... 22 37 38 39 40 41 42 43 44 45 46 47

Thread Information

Users Browsing this Thread

There are currently 1 users browsing this thread. (0 members and 1 guests)

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •