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29 October, 21:47

Consider the following matrix A, and let B = A-1. Find b31, b32, and b33. (i. e., find the entries in the third row of A-1.

A = 1 1 - 2

-9 - 1 0

-2 - 1 2

+2
Answers (1)
  1. 29 October, 22:12
    0
    The result of operation A - 1 is:

    0 0 - 3

    -10 - 2 - 1

    -3 - 2 1

    which is equal to matrix B.

    Looking at the third row we have:

    b31 = - 3

    b32 = - 2

    b33 = 1

    which are the entries in the third row of A - 1
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