2000010510

SubArea: 
Arithmetic sequences
Level: 
B
Project ID: 
2000010510
Accepted: 
0
Clonable: 
0
Easy: 
0
For an arithmetic sequence with \(a_1=-2\), \(a_3=6\), and \(s_n=30\), find \(n\).
\( 5\)
\( 3\)
\( 4\)
There does not exist an arithmetic sequence defined in this way.