1.

Which of the following is NOT correct? (A, B and C are matrices)

A. A.B = B.A
B. A.B.C = (A.B).C = A.(B.C)
C. C(A+B) = C.A + C.B
D. 1 A = A 1
Answer» B. A.B.C = (A.B).C = A.(B.C)


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