Răspunsuri

2014-10-16T23:48:56+03:00
1/(a+1)+1/(b+1)+1/(c+1)+1/(d+1)=2014 |*(-1)

-1/(a+1)-1/(b+1)-1/(c+1)-1/(d+1)=-2014
1-1/(a+1)+1-1/(b+1)+1-1/(c+1)+1-1/(d+1)=4-2014
a/(a+1)+b/(b+1)+c/(c+1)+d/(d+1)=-2010