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Mathematics
If A and B are two matrices such that both A+B and AB are defined, then
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Q. If A and B are two matrices such that both $ A+B $ and AB are defined, then
J & K CET
J & K CET 2003
A
A and B are of same order
B
A is of order $ m\times m $ and B is of order $ n\times n $
C
both A and B are of same order $ n\times n $
D
A is of order m x n and B is of order $ n\times m $
Solution:
Matrices $ ~A+B $ and AB are defined only if both A and B are of same order $ n\times n $ .