It's 1+1 and it equals 2 in decimal system
2H
D_w/c DICK WITH CHEESE
1+2+3+4=10
AgCl
No. You'd have to use the ABC-formula
If you mean the sum of first n natural numbers then the formula is (n(n+1))/2 for example, 1+2+3+4+5=5*6/2=15
times 2 plus 1
(10 + 1) x 10/2
Cr3br
The sum of 2n, for n= 0 to 29.
0
1 + 2 + 4 + ... + 2n = 2n+1 - 1