Răspuns :
S= 1+3+5+7 ..... +19
S= 1+3+5+7......+19
S= 19+17+15+13.......+1
S+S= 20+20+20+20.....+20
2S = 19*20=380
1S = 380:2 = 190
190 LA PUTEREA 2 = 190*190=36100
SUCCES!
S= 1+3+5+7......+19
S= 19+17+15+13.......+1
S+S= 20+20+20+20.....+20
2S = 19*20=380
1S = 380:2 = 190
190 LA PUTEREA 2 = 190*190=36100
SUCCES!