Question

Having understanding how to determine if a matrix is onto. Say \(T(\vec{x})=A\vec{x}\) where

\[
A=
\left[
\begin{array}{c c c}
1 & 1 & 1\\
1 & 2 & 4
\end{array}
\right]
\]
How could you show the standard matrix of this transformation is onto? I understand the general concept of onto, but not yet the mathematical construct.

Answer 1

Having trouble*