Here is the problem that I'm having trouble with:

Rewrite each series in a sigma notation and find its sum.

1+.09+.81+...

I have no idea how I find the common difference or ratio in that one.

2 answers

I don't think you will be able to do it with just those three terms.
perhaps you meant to type

1 + .09 + .0081 + ...

otherwise I agree with bob

If so, then

sum = [sigma] (.09)^(i-1) , i goes from 1 to infinity.

use S(infinity) = a/(1-r)
Similar Questions
  1. Determine whether the infinite series,sigma(((-1)^(n+1))/n)^2 converges or diverges. My professor gave these in a problem set
    1. answers icon 3 answers
  2. rewrite each series using sigma notation9) 1+4+9+16+25+36 and 10) 4+8+12+16+20
    1. answers icon 1 answer
  3. I'm having trouble with a geometric series problem.Determine if the infinite summation of (-3)^(n-1)/4^n converges or diverges.
    1. answers icon 1 answer
    1. answers icon 2 answers
more similar questions