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Question

The rank of the matrix ⎜ ⎜ ⎜1000010000100001⎟ ⎟ ⎟ Is

A
2
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B
3
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C
4
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D
None of these
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Solution

The correct option is C 4
Given,⎢ ⎢ ⎢1000010000100001⎥ ⎥ ⎥
It is an identity matrix of order 4.
Hence, the rank of A=4

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