Question

What is the series of arithmetic numbers formula?

Answer 1

didnt understand your question???

Answer 2

(a,a+d,a+2d,a+3d,......)

Answer 3

The sum of a series formula. I think it is like s= n(n1+nx)/ 2

Answer 4

yes it is
for series like1+2+3+4+....n
S=n(n+1)/2

Answer 5

is this what you want???

Answer 6

what about when the it is not in order, like 3,8,13,18,23,18. which formula would you use then?

Answer 7

S=n/2 + [2a+(n-1)d]
a=first term
d=common diffrence
n=no. of terms...

Answer 8

got it???

Answer 9

thanks a alot!

Answer 10

yes i do!