Question

Find the sum of the series from n=0 to infinity: {[1/(5^n)] + [1/(4^n)]}

Answer 1

\[
\sum_{n=0}^\infty r^n =\frac 1 {1-r} ,\quad |r| < 1
\]

Answer 2

your series is the sum of two series like the above with different r.

Answer 3

yeah I see that now .Thanks!

Answer 4

wait can I be annoying?

Answer 5

How did u get it into that notation?

Answer 6

it is the defination

Answer 7

ya i see it

Answer 8

Thanks