ENEM
ITA
IME
FUVEST
UNICAMP
UNESP
UNIFESP
UFPR
UFRGS
UNB
(FUVEST - 1977)
\(\begin{vmatrix} 1 & 1& 1& 1\\ 1 & 2&2&2\\1&2&3&3\\1&2&3&4\end{vmatrix}=\)
2
1
0
-1
-2