\title	{Columna y fila 2x3}
\language{en}
\author	{XIAO Gang}
\email	{xiao@unice.fr}
\format	{tex}
\range  {-5..5}
\precision{10000}

\integer{a1=random(1..19)*random(-1,1)}
\integer{a2=random(1..19)*random(-1,1)}
\integer{b1=random(1..19)*random(-1,1)}
\integer{b2=random(1..19)*random(-1,1)}
\integer{b3=random(1..19)*random(-1,1)}
\integer{c11=(\a1)*(\b1)}
\integer{c12=(\a1)*(\b2)}
\integer{c13=(\a1)*(\b3)}
\integer{c21=(\a2)*(\b1)}
\integer{c22=(\a2)*(\b2)}
\integer{c23=(\a2)*(\b3)}
\integer{x=\c11}
\integer{y=\c22}
\text{c11=x}
\text{c22=y}
\integer{ch1=random(1..6)}
\text{r1=item(\ch1,\c11&\c12&\c13,\c11&\c13&\c12,\c12&\c13&\c11,
		   \c12&\c11&\c13,\c13&\c11&\c12,\c13&\c12&\c11)}
\text{r2=item(\ch1,\c21&\c22&\c23,\c21&\c23&\c22,\c22&\c23&\c21,
		   \c22&\c21&\c23,\c23&\c21&\c22,\c23&\c22&\c21)}
\integer{ch2=random(1..2)}
\text{R1=item(\ch2,\r1,\r2)}
\text{R2=item(\ch2,\r2,\r1)}

\statement{Tenemos un producto de matrices
$$\pmatrix{a\cr b}\pmatrix{s& t& u}
=\pmatrix{\R1\cr \R2}. $$
¿Calcular los valores de $x$ e $y$ ?
}

\answer{x}{\x}
\answer{y}{\y}
\hint{¿Hay alguna proporcionalidad entre las columnas de la matriz?}
