PGF for uniform discrete distribution given in tables is different from the one given in solution of ques 5.5. though the core reading states that mod t<=1. plz explain.
Actually what i meant was that formula we are using in example is for gp series where r is less than 1 And in tables i think it is calculated using formula for r greater than 1. t or s are dummy variable ,we can use either.
We only need |r|< 1 when we are summing an infinite geometric series. In Q5.5 this is a finite series so the condition is not needed.
