Results 1 to 3 of 3

Math Help - What's the rank of the matrix?

  1. #1
    Newbie
    Joined
    Jan 2010
    Posts
    13

    What's the rank of the matrix?

    I guess the rank of the matrix is 2.But I fail to prove it.Can you help me? Thank you.
    Attached Thumbnails Attached Thumbnails What's the rank of the matrix?-image.jpg  
    Follow Math Help Forum on Facebook and Google+

  2. #2
    Banned
    Joined
    Oct 2009
    Posts
    4,261
    Quote Originally Posted by tianye View Post
    I guess the rank of the matrix is 2.But I fail to prove it.Can you help me? Thank you.

    Substract from the k-th row (k-1)-times the SECOND row, and check you always get a multiple of the FIRST row. Since the 1st and 2nd rows are clearly lin. independent you get that the rank indeed is 2.

    Tonio
    Follow Math Help Forum on Facebook and Google+

  3. #3
    Member
    Joined
    Jan 2009
    Posts
    153
    ref picture
    Attached Thumbnails Attached Thumbnails What's the rank of the matrix?-q68.jpg  
    Follow Math Help Forum on Facebook and Google+

Similar Math Help Forum Discussions

  1. Rank of a Matrix
    Posted in the Advanced Algebra Forum
    Replies: 2
    Last Post: October 17th 2010, 06:43 AM
  2. Replies: 3
    Last Post: August 20th 2010, 05:32 AM
  3. Is the rank of a 3x3 matrix all 0 .....
    Posted in the Advanced Algebra Forum
    Replies: 2
    Last Post: July 27th 2010, 04:40 AM
  4. Replies: 1
    Last Post: April 1st 2010, 08:34 AM
  5. Rank of Matrix ??
    Posted in the Advanced Algebra Forum
    Replies: 1
    Last Post: October 8th 2008, 07:58 AM

Search Tags


/mathhelpforum @mathhelpforum