Sum

[kj13529]

I need to find the sum of 2^n/n! from n=2 to infinity, i know that it converges to e^x but how do i find the sum?

[Kummer]

I need to find the sum of 2^n/n! from n=2 to infinity, i know that it converges to e^x but how do i find the sum?

It is e^2.
Since x^n/n! sums to e^x substitute x=2 to get answer.

[kj13529]

Thanks, it was so simple -.-