If A B is defined, then B A need not be defined. Now, let A=[6 9 2 3] and B=[2 6 0 7 9 8], then B A is

Question

If A B is defined, then B A need not be defined. Now, let A=[6 9 2 3] and B=[2 6 0 7 9 8], then B A is (A) [12 25 39 72] (B) [72 29 24 75 25 117] (C) [75 117 72 25 39 24] (D) not defined

Tardigrade Admin · Accepted Answer

Here, A=[6 9 2 3] and B=[2 6 0 7 9 8] If A B is defined, then B A need not be defined. In the above example, A B is defined but B A is not defined because B has 3 columns, while A has only 2 (and not 3 ) rows.

Q. If $A B$ is defined, then $B A$ need not be defined. Now, let $A = [6293]$ and $B = [276908]$ , then $B A$ is

$[12392572]$

$[7275292524117]$

$[7525117397224]$

not defined

Here, $A = [6293]$ and $B = [276908]$
If $A B$ is defined, then $B A$ need not be defined. In the above example, $A B$ is defined but $B A$ is not defined because $B$ has 3 columns, while $A$ has only 2 (and not 3 ) rows.

Q. If AB is defined, then BA need not be defined. Now, let A=[62​93​] and B=[27​69​08​], then BA is

[1239​2572​]

[7275​2925​24117​]

[7525​11739​7224​]