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Question

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 ?
  1. m
  2. 1
  3. n
  4. none of these

A
m
B
none of these
C
n
D
1
Solution
Verified by Toppr

Since, order of matrix A is m×1
Rank of Amin m,1
Rank of A is 1.

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