Question

Financial Mathematics:

screenshot attached

Answer 1

So to start with, i said
let
FV payout = FV payments=S(n,i)X
where n=working life
i=superannuation fund earning rate
r=constant salary increase rate per annum
X=annual payment
m=final payment

Answer 2

now S(n,i)=\[\sum_{k=0}^{k=n-1}(1-i)^k\]