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Mathematics
Mathematics
Problem
Let
A
A
A
and
B
B
B
be invertible
3
×
3
3\times3
3
×
3
matrices. Express
(
B
T
A
)
−
1
(B^{T}A)^{-1}
(
B
T
A
)
−
1
in terms of
A
−
1
A^{-1}
A
−
1
and
B
−
1
B^{-1}
B
−
1
.
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