- #1
Jbreezy
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Homework Statement
Let A and B be matrices of the same size.
a.) prove the jth column of ## A + B## is ## a_j + b_j ##
Homework Equations
Where is i? In their question?
The Attempt at a Solution
What if you did this.
##
A=
\begin{pmatrix}
a_{1j}\\
a_{2j}\\
a_{3j}
\end{pmatrix}
##
B = ##
\begin{pmatrix}
b_{1j}\\
b_{2j}\\
b_{3j}
\end{pmatrix}
##
A+B = ##
\begin{pmatrix}
a_{1j} + b_{1j}\\
a_{2j} + b_{2j}\\
a_{3j} + b_{3j}
\end{pmatrix}
##
But I still have i and they say prove that it is aj + bj
I hope that code is right for the matrix when I preview it is would not show. EDIT Why does my code not work ?
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