Question

1+3+5+......+51,Dau coroana plisssssss!!!!!!!!!!​

Answer 1

Răspuns:

26x(1+51):2

26x26=676

Answer 2

Răspuns:

1+3+5+...+(2n-1) = n^2

1+3+5+...+51 = n^2

2n-1=51 =>n=26

1+3+5+...+51 = 26^2 = 676