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anonymous
 5 years ago
if a diagonal matrix is commutative with every matrix of the same order,then it is necessarily a ______ matrix
a. zero matrix
b. unit matrix
c. scalar matrix
d. a symmetric matrix
the ans is c... please explain how?... @Mathematics
anonymous
 5 years ago
if a diagonal matrix is commutative with every matrix of the same order,then it is necessarily a ______ matrix a. zero matrix b. unit matrix c. scalar matrix d. a symmetric matrix the ans is c... please explain how?... @Mathematics

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anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0i need explanation please... i have the key...

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0consider a general diagonal matrix to be A=[a 0,0,b] and other matrix B=[w x , y z] then compute AB then BA and then equate both which will you a=b which is a scalar matrix ....
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