2 plus n is the true one, but 1 plus n is not?
(n2 + n)/2 1+2+3+4+5+n= 15+n
2 plus 2 plus n equals 6 n equaling 2
if (n%2==0) sum=n/2*(n+1); else sum=(n+1)/2*n;
They have n in common.
That would be 18+n. 5+3+2 = 5+3+n 10 = 8 + n 10-8 = n 2 = n and if you substitute 2 for n then you see that 5+3+2 = 5+3+2
N
n^2 + n
n = 28
The chemical formula of rubidium is Rb, and the chemical formula of nitrogen is N.
3^n+2+3^n = 6^n+2 *'to the power of' can be represented with this symbol ^ .
If the question means solve 1+2+...+60 then 1+2+...+n = n(n+1)/2 for any integer n>0 So for n= 60 the sum is 60*61/2 = 30*61 = 1830