=(1+4%)/(1+8%)+(1+4%)^2/(1+8%)^2+(1+4%)^2*(1+3%)/(1+8%)^3+(1+4%)^2*(1+3%)^2/(1+8%)^4+(1+4%)^2*(1+3%)^2/(8%-2%)=22.74
不知道对不对,哈哈
真棒!
=(1+4%)/(1+8%)+(1+4%)^2/(1+8%)^2+(1+4%)^2*(1+3%)/(1+8%)^3+(1+4%)^2*(1+3%)^2/(1+8%)^4+(1+4%)^2*(1+3%)^2*(1+2%)/(1+8%)^4(8%-2%)=17.96