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# How Many 2 by 2 Row Echelon Forms?

LINALG-5JM9C7

How many possible 2 by 2 matrices are there which are in row echelon form and contain only zeros and ones?

A

One.

B

Two.

C

Three.

D

Four.

E

Five.

F

Six.

G

Infinitely many.

H

None of the above.