[" 10.For any two matrices "A" and "B" ,we "],[" have "^(*)]

For any two matrices A and B of the same order; (A+B)^(T)=A^(T)+B^(T)

Which one of the following is true for any two square matrices A and B of same order?

If A and B are any two matrics then

Commutativity : For any two literals a and b we have a+b=b+a

For any two vectors vec(a) and vec(b) , we always have |vec(a).vec(b)| le |vec(a)||vec(b)| . (Cauchy Schwartz inequality)

For any two vectors vec(a) and vec(b) , we always have |vec(a)+vec(b)|le|vec(a)|+|vec(b)| (triangle inequality).

If A and B are two matrices such that A+B =AB , then

Commutativity : For any two literals a and b we have ab=ba