Question
Approximate the sum of the series correct to four decimal places.
(-1)^n/(n!5^n) (from n=1 to infinity)
(-1)^n/(n!5^n) (from n=1 to infinity)
Answers
oobleck
You know that e^x = ∑x^n/n!
Now let x = -1/5
Now let x = -1/5