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math115: add rref

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see? eifueo is important. otherwise you forget what a rref is on the test which screws you over
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eggy 2022-10-12 19:02:15 -04:00
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@ -371,6 +371,8 @@ The **row echelon form** of a matrix makes a system rapidly solvable by effectiv
\end{array}\right] \end{array}\right]
$$ $$
The **reduced row echelon form** of a matrix makes a system even more rapidly solvable by performing even more elimination on the system such that each **leading variable** is equal to one, and that variable is the only variable in the coefficient matrix.
The **rank** of a matrix is equal to the number of leading entries any row echelon form. The **rank** of a matrix is equal to the number of leading entries any row echelon form.
$$\text{rank}(A)$$ $$\text{rank}(A)$$