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[M] Let $A$ be the matrix in Exercise $35 .$ Construct a matrix $C$ whose columns are the pivot columns of $A,$ and construct a matrix $R$ whose rows are the nonzero rows of the reducedechelon form of $A .$ Compute $C R,$ and discuss what you see.

$A=C R=\operatorname{col} A \cdot \operatorname{Row} A$

Calculus 3

Chapter 4

Vector Spaces

Section 6

Rank

Vectors

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