I'd like help with a formula for calculating Future Value given the following:
An amount is invested at the END of every year, starting with amount of PMT at the end of this year, at an interest rate of i% per year, compounded annually,the investment amount doubles every second year (cumulatively).
I'm finding it hard to wrap my head around the last bit, "investment amount doubles every second year" as the Future Value of growing annuity formula make provisions for investment that grows per year and not per second year, how can I proceed?
