Question

If 1+2+3+....n666value of n

Answer 1

Answer:

36

Step-by-step explanation:

S=1+2+3+....n=1/2*n(n+1)

If S=666, we have:

1/2*n(n+1)=666

n*(n+1)=666*2

n^2+n=1332

n^2+n-1332=0

Solving this we get n=36