If `A`
is an invertible matrix
of order 3, then which of the following is not true
(a) `|a d j\ A|=|A|^2`
(b) `(A^(-1))^(-1)=A`
(c) If `B A=C A`
, then `B!=C`
, where `B`
and `C`
are square matrices of order 3
(d) `(A B)^(-1)=B^(-1)A^(-1)`
, where `B=([b_(i j)])_(3xx3)`
and `|B|!=0`
Text Solution
Verified by Experts
If `B A=C A`
, then `B!=C`
, where `B`
and `C`
are square matrices of order 3
if A is invertible matrix of order 3 then `A^(-1)` exists.
Now BA=AB
...
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