【正确答案】(1)方案1的现值=10+1×(P/A,5%,8)=10+15×6.4632=106.95(万元) 方案2的现值=50×(P/F,10%,2)+100(P/F,10%,8)=500.8264+100×0.4665=87.97 (万元) 方案3的现值=30×(P/A,10%,4)(P/F,10%,3)=30×3.1699×0.7513=71.45(万元) 方案4的现值=10+28×(P/A,10%,5)×(P/F,10%,1)=10+28×3.7908×0.9091=106.49 (万元) 方案5的付款现值=5+25×(P/A,10%,6)=5+25×43553=113.88(万元) 或:方案5的付款现值=5+25×[(P/A10%,5)+1×(P/F,10%,1)=5+25×(3.7908 +1)×0.9091=113.88(万元) 提示:[(P/A,10%,5)+1×(P/F10%,1)=(P/A,10%,6)×(1+10%)×(P/F, 10%,1)=(PA,10%,6) 结论:最合理的是方案3