Systems of Linear Equations

Row reduction, Gaussian elimination, solution structure, rank, and the LU factorization.0/8 mastered

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Let

A = \begin{pmatrix}2&1&1\\4&-6&0\\-2&7&2\end{pmatrix}

and let

A = LU

be its factorization with

L

unit lower triangular. What is the multiplier

\ell_{21}

, the

(2,1)

entry of

L

Your answer

#5503