First slide

Elementary row operations (Transformation)

Question

The rank of $[\begin{matrix} 4 & 0 & 0 \\ 0 & 4 & 0 \\ 0 & 0 & 4 \end{matrix}]$ is

Moderate

A

1
B

2
C

3
D

4

Solution

No. of non-zero rows in the echelon form is 3 then rank of matrix =3

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