Question

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

Answer 1

Answer:741

Step-by-step 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

$S_n=\frac{n}{2}[a_1+a_n]$

$S_n=\frac{13}{2}[16+98]$

$S_n=\frac{13\times 114}{2}$

$S_n=13\times 57$

$S_n=741$

Sp sum of n terms is 741