1003107202

SubArea: 
Arithmetic sequences
Level: 
C
Project ID: 
1003107202
Accepted: 
1
Clonable: 
0
Easy: 
0
The second term of an arithmetic sequence is −21, the fifth term is 21. How many of the first consecutive terms do we have to add up to get a sum of more than 50?
8
7
6
9
5