请教: lv2 future value interest factor after all taxes future, 如何, factor, interest

Destiny

请问如何推导 FVIFT=[((1+RART)^N)*(1-TECG)]+TECG-(1-B)TCG，given RART=R(1-PITI-PDTD-PCGTCG) and TECG=TCG(1-PI-PD-PCG)/(1-PITI-PDTD-PCGTCG). 谢谢！！