Cumulative distribution function and distribution function

Hi there,

I am working on a question where I am given the probability density fuction and asked to calculate the cumulative distribution function. I am then asked to calculate the inverse cumulative distribution function. Then I am asked to use the inverse to calculate the distribution function. I have unsure of 2 things:

1: Do you calculate the inverse to a cumulative distribution function as you would any function?

2: What is the relationship between the CGF's inverse and the distribution function?

Thanks

Nappy

Re: Cumulative distribution function and distribution function

Usually inverse of prob distributions need asymptotic expansions and series...etc. You can find them in some math & stat references & handbooks.