1. ## Arithmetic progression

In an arithmetic progression,the fourth term is 8 and the sum of the first 12 terms is 156.determine the sum of the second 10 consecutive terms..

i get the first term and common difference is:

a=2

d=2

2. Originally Posted by mastermin346
In an arithmetic progression,the fourth term is 8 and the sum of the first 12 terms is 156.determine the sum of the second 10 consecutive terms..

i get the first term and common difference is:

a=2

d=2
compute $\displaystyle S_{20} - S_{10}$

dd