1000*(1+0.005+0.005平方+...+0.005的60次方)=?
问题描述：
1000*(1+0.005+0.005平方+...+0.005的60次方)=?
答
1000*(1+0.005+0.005^2+...+0.005^60)
=1000(1-0.005^61)/(1-0.005)
=1000/0.995-1000*0.005^61/0.995
≈1000/0.995=1005.0251256281407035175879396985