Question

Span of a matrix help?

Answer 1

\[\left[\begin{matrix}3 & 1 & 4 & 2 \\ 0 & 2 & 3 & 1\\ 0 & 0 & 0 & 3\end{matrix}\right]\]

Answer 2

Need to describe the span of this matrix but not sure how to fully do that and have doubts about the last row considering that 0 is not = 3

Answer 3

http://www.wolframalpha.com/input/?i=span+ {+{3%2C+0%2C+0}%2C{1%2C2%2C0}%2C{4%2C3%2C0}%2C{2%2C1%2C3}+}