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Matrix Multiplication

Yankel

Active member
Jan 27, 2012
398
Hello

I have a question, I need to tell if there exist A such as:

[tex]A\cdot \begin{pmatrix} 0\\ 1\\ 4 \end{pmatrix} =\begin{pmatrix} 1\\ 2\\ 3\\ 4 \end{pmatrix}[/tex]

how do you approach this kind of questions ?

thanks !
 

Ackbach

Indicium Physicus
Staff member
Jan 26, 2012
4,192
You already know what size $A$ must be. What would that be?
 

caffeinemachine

Well-known member
MHB Math Scholar
Mar 10, 2012
834
Hello

I have a question, I need to tell if there exist A such as:

[tex]A\cdot \begin{pmatrix} 0\\ 1\\ 4 \end{pmatrix} =\begin{pmatrix} 1\\ 2\\ 3\\ 4 \end{pmatrix}[/tex]

how do you approach this kind of questions ?

thanks !
Define a linear transformation $T:\mathbb{R}^3\rightarrow \mathbb{R}^4$ as $T(1,0,0)=(0,0,0,0), T(0,1,0)=(1,2,3,4), T(0,0,1)=(0,0,0,0)$. Find the matrix of $T$ with respect to the standard bases. That is one possible matrix for $A$.