(a) Show that is invertible if and only if a 0 and b 0. (b) If A...
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is invertible if and only if a 0 and b 0.
(b) If A and B are square and invertible, show that (i) the block matrix
Is invertible for any Xi and
(ii)
(c) if
is invertible, show that A and B are invertible. Write the inverse as
where A1 and B1 are the same size as A and B. Use block multiplication.]
Transcribed Image Text:
.rわ A X 0 B 0 B 0 B-1 0 B
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