Let U be an n m matrix that is in echelon form, and let Dbe an n n diagonal matrix
Chapter 3, Problem 69(choose chapter or problem)
Let U be an n m matrix that is in echelon form, and let Dbe an n n diagonal matrix. Prove that the product DU is equalto the matrix U with each row multiplied by the correspondingdiagonal entry of D. (That is, the first row of U multiplied by d11,the second row of U multiplied by d22, and so on.)
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