【答案解析】ΔNPV=22426×(P/A,ΔIRR,4)+26426×(P/F,ΔIRR,5)-90000
当i=8%时,
ΔNPV=22426×(P/A,8%,4)+26426×(P/F,8%,5)-90000
=22426×3.3121+26426×0.6806-90000
=2262.69(元)
当i=10%时,
ΔNPV=22426×(P/A,10%,4)+26426×(P/F,10%,5)-90000
=22426×3.1699+26426×0.6209-90000
=2503.92(元)
