+0  
 
0
5
0
avatar+1484 

Let $a_1,$ $a_2,$ $a_3,$ $\dots$ be an arithmetic sequence.  Let $S_n$ denote the sum of the first $n$ terms.  If $S_1 = \frac{1}{5}$ and $S_2 = \frac{1}{10},$ then find $S_{15}.$

 
 Feb 22, 2024

3 Online Users

avatar