Convert to RREF

$\newenvironment {prompt}{}{} \newcommand {\ungraded }[0]{} \newcommand {\exchange }[2]{#2#1} \newcommand {\HyperFirstAtBeginDocument }[0]{\AtBeginDocument }$

This “validator” is actually a set of subfunctions to be used in validators. This reduces a numeric matrix into reduced row echelon form.

This “validator” is actually a collection of subfunctions that compute the reduced row echelon form for a numeric matrix.

Specifically, a matrix should be entered into the answer box in the following format:

$[ [r1c1,r1c2,r1c3],[r2c1,r2c2,r2c3],[r3c1,r3c2,r3c3] ]$ .

So, if a student wishes to enter the matrix:

$\left [\begin {matrix} 1 & 2 & 3 \\ 4 & 5 & 6 \\ 7 & 8 & 9 \end {matrix}\right ]$

They would enter into the answer prompt: $[ [1,2,3], [4,5,6], [7,8,9] ]$ .

Put in a matrix using the format: $[ [r1c1,r1c2,r1c3],[r2c1,r2c2,r2c3],[r3c1,r3c2,r3c3] ]$ , and it should be converted into reduced row echelon form below. Hopefully.

$\answer [validator=convertToRREF]{[ [1,2,3], [4,5,6], [7,8,9] ]}$