- #1

Char. Limit

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## Homework Statement

Yeah, so I'm just starting LinAlg, and I wanted to check my answer on a certain question. The question reads:

"Describe the possible echelon forms of a nonzero 3x2 matrix. Use the symbols [tex]\diamond[/tex], *, and 0, as in the first part of example 1."

Now, here, the [tex]\diamond[/tex] indicates a nonzero entry, the * indicates an entry that can be any value, and the 0 indicates, well, a zero entry.

## The Attempt at a Solution

So I got four matrices:

[tex]\left[ \begin{array}{cc}

\diamond & 0 \\

0 & 0 \\

0 & 0 \\

\end{array} \right][/tex]

[tex]\left[ \begin{array}{cc}

\diamond & * \\

0 & \diamond \\

0 & 0 \\

\end{array} \right][/tex]

[tex]\left[ \begin{array}{cc}

\diamond & * \\

0 & * \\

0 & \diamond \\

\end{array} \right][/tex]

[tex]\left[ \begin{array}{cc}

\diamond & * \\

0 & * \\

0 & * \\

\end{array} \right][/tex]

However, I feel like I'm missing some. Can you help me with which ones?