3 years ago

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.

1 answer:

Elena-2011 [213]3 years ago

4 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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