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problema GM 2/1999
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problema GM 2/1999
Posted:
Wed Mar 04, 2009 6:52 pm
by
Al3xx
Fie
\( x,y \in R \)
astfel incat
\( x(2x+y+1) + y(y+\frac{1}{2}) = 0 \)
.Sa se arate ca :
\( 2x+y \in \[-\frac{8}{7},0\]. \)