%% Test fet per Jaume AguadĒ

\documentclass[12pt,a4paper]{article}
\pagestyle{empty}
\usepackage{amsmath,amssymb}
\usepackage[catalan]{babel}
\usepackage[pdftex,designi]{web}
\usepackage{exerquiz}

\newcommand{\ca}{$\phantom{\frac{\int_0^1 f(x)}{\int_0^1f(x)}}$}
\newcommand{\ta}{$\phantom{\frac{\int}{\int}}$}
\newcommand{\problema}{\item}

\def\titolexamen{Petit test} % El t\'{\i}tol de l'examen.
\newcommand{\combi}[2]{\left(\begin{matrix}#1\\#2\end{matrix}\right)}
\begin{document}

\begin{center}{\Large
\textbf{\titolexamen}}
\end{center}

{\Large Una sola}

\begin{shortquiz}Calculeu $\left|\combi72-\combi63+\log_2256\right|$.
\begin{answers}{4}
\Ans0 6 &\Ans0 $-6$ &\Ans0 $-3.41$ &\Ans1 9

\end{answers}
\end{shortquiz}

\newpage
{\Large Varies}
\useBeginQuizButton \useEndQuizButton
\begin{quiz}{prova1}
\begin{questions}

\item Trobeu les coordenades del vector $(-1,2)$ en la base
$\mathcal B=\{(1/2,1),(-1,1)\}$.

\begin{answers}4
\Ans1 $2/3,\,4/3$& \Ans0  $-1,\,2$ &\Ans0 $-5/2,\,1$& \Ans0
$1,\,0$
\end{answers}

\item Calculeu el determinant de
$$\left(\begin{matrix}
1&0\\-1&1\\2&1
\end{matrix}\right)\left(\begin{matrix}
-1&3&1\\5&-1&-2
\end{matrix}\right)$$

\begin{answers}4
\Ans1 0 &\Ans0 1 &\Ans0  $-1$ &\Ans0   $-2/5$
\end{answers}


\item Trobeu els valors propis de la matriu $\left(\begin{matrix}
1&-2\\-1&0
\end{matrix}\right)$

\begin{answers}4
\Ans1 $2,\,-1$ & \Ans0 No en t\'{e} cap & \Ans0 $1\pm\sqrt3$ &
\Ans0 $0,\,-1$
\end{answers}
\end{questions}
\end{quiz}

\ScoreField{prova1}

\end{document}