Question

What is Sn for the arithmetic series in which a1=16 , an=98 and n =13?

Answer 1

Answer:741

Explanation:

Given

First term
`a_1=16`

last term
`a_n=98`

and no of terms
`n=13`

And sum of n terms is given by

`S_n=(n)/(2)[a_1+a_n]`

`S_n=(13)/(2)[16+98]`

`S_n=(13* 114)/(2)`

`S_n=13* 57`

`S_n=741`

Sp sum of n terms is 741