1,5.33%*(1-25%)=0.04 2,3%%2B9%*1.5=0.165 3,0.04*3/5%2B16.5%*2/5=0.09,当收益率大于9%时,项目才可行 4,(600-240-45)*75%%2B1200/4*25%=311.25 5,1200*20%*75%=180 6,600*20%=120 7,0时点,-1200-120 1-3年,311.25 4年,311.25%2B180%2B120 8,-1200-120%2B311.25*(P/A,9%,3)%2B(311.25%2B180%2B120)*(P/F,9%,4) 如果大于0,可行