Question

Find the sum of this series.

Answer 1

series from n=o to infinity of (7/9)^n * 1/n!

Answer 2

Hint:
we have the subsequent sum:
\[\Large \sum\limits_{n = 0}^\infty {\frac{{{x^n}}}{{n!}}} = \exp \left( x \right)\]

Answer 3

e^ (7/9)

Answer 4

that's right!

Answer 5

Can't believe I missed that, thanks!

Answer 6

thanks!

Answer 7

is it (7/9)^e