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bigmansouf
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Question:
Find AB if A  = \begin{pmatrix}z & y\\ 

x & w\\ 

v & u

\end{pmatrix} and B  = \begin{pmatrix}

a & b & c\\ 

d & e & f

\end{pmatrix}



Solution:
A has a 3 X 2 matrix and B has a 2 X 3 matrix
thus AB has a 3 X 3 matrix



\begin{pmatrix}

(za+yd) &(zb+ye)  &(zc+yf) \\ (xa+wd) &(xb+we)  &(xc+wf) \\  (va+ud)&(vb+ue)  & (vc+uf)

\end{pmatrix}

I would like to know if I am right
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mqb2766
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Yes.
(Original post by bigmansouf)
Question:
Find AB if A  = \begin{pmatrix}z & y\\ 

x & w\\ 

v & u

\end{pmatrix} and B  = \begin{pmatrix}

a & b & c\\ 

d & e & f

\end{pmatrix}



Solution:
A has a 3 X 2 matrix and B has a 2 X 3 matrix
thus AB has a 3 X 3 matrix



\begin{pmatrix}

(za+yd) &(zb+ye)  &(zc+yf) \\ (xa+wd) &(xb+we)  &(xc+wf) \\  (va+ud)&(vb+ue)  & (vc+uf)

\end{pmatrix}

I would like to know if I am right
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casperyc
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If you follow the rules of Matrix multiplication, it's pretty damn easy to check ...
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