Question

In an ap an=2n then the value of S3 is

Answer 1

Answer:

$S_{3}=12$

Step-by-step explanation:

Calculating first, second and third term -

$a_{1}=2(1)=2$

$a_{2}=2(2)=4$

$a_{3}=2(3)=6$

The sum of first three terms are -

$S_{3}=a_{1}+a_{2}+a_{3}$

⇒$S_{3}=2+4+6$

⇒$S_{3}=12$

Answer 2

Answer:

a¹=2(1)=2 a²=2(2)=4a³=2(3)=6