Results 1 to 2 of 2

Math Help - S contains T if the intersection is T

  1. #1
    Member
    Joined
    Oct 2009
    Posts
    195

    S contains T if the intersection is T



    Is this sufficient? I feel like I missed something sire I did not use the S union T property.
    Follow Math Help Forum on Facebook and Google+

  2. #2
    Banned
    Joined
    Oct 2009
    Posts
    4,261
    Thanks
    2
    Quote Originally Posted by davismj View Post


    Is this sufficient? I feel like I missed something sire I did not use the S union T property.

    What you did is enough: T\subset S\Longleftrightarrow S\cap T=T , no need at all to assume anything about the union, BUT we also have T\subset S\Longleftrightarrow S\cup T=S , without any assumption on the intersection, so perhaps the question was to prove that T is a subset of S iff any of those two properties, separatedly, is true.

    Tonio
    Follow Math Help Forum on Facebook and Google+

Similar Math Help Forum Discussions

  1. Self intersection
    Posted in the Geometry Forum
    Replies: 3
    Last Post: August 1st 2010, 05:15 AM
  2. The intersection of x and ln(x)^p, where p>1
    Posted in the Calculus Forum
    Replies: 2
    Last Post: November 24th 2009, 09:06 AM
  3. Replies: 2
    Last Post: October 19th 2009, 03:47 AM
  4. Another intersection:
    Posted in the Calculus Forum
    Replies: 1
    Last Post: June 6th 2008, 11:26 PM
  5. intersection
    Posted in the Calculus Forum
    Replies: 4
    Last Post: February 11th 2008, 09:20 AM

Search Tags


/mathhelpforum @mathhelpforum