Răspuns :
x=(2-1)+ (4-3)+ (6-5)+....+(100-99)
x=1+1+1+...+1 de 50 de ori
x= 50
O zi buna!
x=1+1+1+...+1 de 50 de ori
x= 50
O zi buna!
1+3+++99=50x101:2=2500
2+4++100=50x102:2=2550
2500+x=2550
x=2550-2500
x=50
2+4++100=50x102:2=2550
2500+x=2550
x=2550-2500
x=50