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√1+2+3+4+.....+288= 
                               
                                                            sau
√1+2+3+....+360+361x181=


Răspuns :

√1+2+3+4+.....+288=√288*289:2=√41616=204


√1+2+3+....+360+361x181==√(360*361:2)+(361*181)=√(361*180)+(361*181)=√361(180+181)=√361*361=361




1+2+3+........288=(1+288)*288:2
                          =289*288:2
                           =41616    
radical=204

1+2+3+......360=64980
64980+361*181=130321
radical=361