SOLUTION: Summation notation help please!! What is the summation notation for the series? 200+175+150+125+...+(-300) What is the sum of the arithmetic series? 5 Σ; (3n-2) n-1 Wha

Algebra ->  Sequences-and-series -> SOLUTION: Summation notation help please!! What is the summation notation for the series? 200+175+150+125+...+(-300) What is the sum of the arithmetic series? 5 Σ; (3n-2) n-1 Wha      Log On


   

Question 1001260: Summation notation help please!!
What is the summation notation for the series?
200+175+150+125+...+(-300)
What is the sum of the arithmetic series?
5
Σ; (3n-2)
n-1
What is the sum of the geometric series? Round to the nearest whole number.
16
Σ; 6(1/4)^n
n-1
Answer by ikleyn(52776) About Me  (Show Source):
You can put this solution on YOUR website!
.
What is the sum of the arithmetic series?
5
Σ; (3n-2)
n=1
========================================

Arithmetic progression.  The first term a%5B1%5D = 1.  The common difference is  3.  The last term is  3*5-2 = 13.

The sum is  %28%28a%5B1%5D%2Ba%5B5%5D%29%2A5%29%2F2 = %28%281+%2B+13%29%2A5%29%2F2 = 35.