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math

posted by on .

Let B=
0 1
1 0
Find B if it is to the negative one power. (Its supposed to be a matrix, but I don't know how to write the brackets on the computer)

  • math - ,

    it is supposed to be
    0, 1
    1, 0
    not 01 and 10. sorry

  • math - ,

    In other words find the inverse matrix?
    0,1
    1,0
    times
    a,b
    c,d
    equals identity matrix
    1,0
    0,1
    then
    c = 1
    d = 0
    a = 0
    b = 1
    so
    0,1
    1,0
    In other words, it is its own inverse
    here is a link
    http://www.mathwords.com/i/inverse_of_a_matrix.htm

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