If A is a non-zero column matrix of order m×1 and B is a non-zero row matrix of order 1×n then rank of AB equals ?
m
1
n
none of these
A
m
B
none of these
C
n
D
1
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Solution
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Since, order of matrix A is m×1 Rank of A≤minm,1 Rank of A is 1.
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