👤

calculati sumele 
a. 2+4+6+.....+2014
b. 2 la puterea1+ 2 la puterea 2+2 la puterea 3+....2 la puterea 2014


Răspuns :

2*(1+2+3+4+... +1007)= =2*[(1007*1008):2]= =2*[1015056:2]= =2*507528= =1015056