SOLUTION: 1 + 6 + 11+...+81

Algebra ->  Sequences-and-series -> SOLUTION: 1 + 6 + 11+...+81      Log On


   

Question 709480: 1 + 6 + 11+...+81
Answer by MathLover1(20850) About Me  (Show Source):
You can put this solution on YOUR website!
general formula for this sequence is:
5n%2B1.........n={0,1,2,....,16}
so, you have