Question: (a) Show that for every A E Mat2,2(|R), we have a b . . . A:=( d)1smvert1b1e 4:) adbcak c Compute the inverse of A

(a) Show that for every A E Mat2,2(|R), we have a b . . . A:=( d)1smvert1b1e 4:) adbcak c Compute the inverse of A in either case. (b) Compute the respective inverses of the following matrices; you may use without proof that these are all invertible. 1 2 3 _2 3 1 1 1 1 0 1 2 3 4 2 3 4 1 1 2 1 1 0 1 5 6 7 8 110'521'1011'9101112 0 1 1 1 13 14 15 16

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