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Calculati radical din 2x+1 unde de x =1+3+3 la puterea a 2 a+ 3 la puterea a 3a+......+3 la puterea2013
Dau coroana


Răspuns :

x= 1+3+3²+3³+....+3^2013=(3^2014-1)/(3-1)=(3^2014-1)/2
atunci 2x+1=3^2014-1+1=3^2014

√(3^2014)=√(3^1007)²=3^1007
as simple as that!!!