Question

What is the formula for the sum of a finite arithmetic series?

Answer 1

do you mean \[\huge S_n = \frac{n(a_1 + a_n)}{2}?\]

Answer 2

im not sure

Answer 3

that's the formula for the sum of arithmetic series :)

Answer 4

sn is the sum
n is the number of terms
a1 is the first term
an is the last term
2 is a constant

Answer 5

thanks!

Answer 6

<tips hat>

Answer 7

\[\huge \sum _{ i=1 }^{ n }{ { a }_{ i } } [\frac { n }{ 2 } ]({ a }_{ 1 }{ a }_{ n })\]