Question

determina suma numerelornaturale mai mici decat 3 la puterea 2

Answer 1

3^2=3×3=9

{x apartine N | x<9}

N=multimea numerelor naturale

x=0,1,2,3,4,5,6,7,8

0+1+2+3+4+5+6+7+8= 36