FVIF(10%,3)=3.310 FVIF(11%,3)= 3.342 FVIF(i,3)=10000/7500=1.3333(10%-i)/(11%-10%)=(3.31-1.3333)/(3.342-3.310)i=10%-(3.31-1.3333)/(3.342-3.310)*(11%-10%)i= -51.77%你的数据有问题