*** QuickLaTeX cannot compile formula:
\[
\begin{array}{l}
Determinati\;functiile\;f]
*** Error message:
\begin{array} on input line 9 ended by \end{document}.
leading text: \end{document}
Improper \prevdepth.
leading text: \end{document}
Missing $ inserted.
leading text: \end{document}
Missing } inserted.
leading text: \end{document}
Missing \cr inserted.
leading text: \end{document}
Missing $ inserted.
leading text: \end{document}
You can't use `\end' in internal vertical mode.
leading text: \end{document}
\begin{array} on input line 9 ended by \end{document}.
leading text: \end{document}
Missing } inserted.
leading text: \end{document}
Emergency stop.
Concursul „Grigore Moisil”, Urziceni, 2013
f(x)=x+1. Demonstratia mea e cam lunga si anevoioasa… nu cred ca e tocmai ok s-o scriu… poate gasesc o solutie mai simpla… astepti sau vrei s-o vezi pe asta cum arata!??
Nu este urgent, deci voi astepta daca puteti gasi o rezolvare mai simpla.