Posted by **mary11** on Tuesday, December 12, 2006 at 7:50pm.

In sequences and series:::

I dont understand the difference between (for arthemtic series) the equations

1) sn= t/2(ti-tn)

2) (n* n-1)/2

where would you use each one and how are they different?

## Answer this Question

## Related Questions

- Sequences and Series - PreCal. What is the difference between the equations (n(n...
- Math - I'm learning series and sequences (grade 11). Please check that my steps ...
- math - the "k"th term of a series, Sk=a 1-r^k/1-r, is the sum of the first "k" ...
- Algebra - Using the index of a series as the domain and the value of the series ...
- Algebra 2: Sequences and Series - I have this question and I don't understand ...
- Math - Using the index of a series as the domain and the value of the series as ...
- Math - I have a couple questions about the sums of geometric series. One. So the...
- Series and sequences - Three numbers a,b, and c form a geometric series so that ...
- math - for this infinite series (-1)^n/n^2 if i use alternating series test to ...
- calculus - I need help understanding how the series of e derives into the ...

More Related Questions