1/(2/3)/(3/4)/(4/5)/(5/6)/(6/7)/(7/8)=3/2×4/3×5/4×6/5×7/6×8/7=8/2=4
(0+1)x(1+2)x(2+3)x(3+4)x(4+5) =1*3*5*7*9 =15*7*(10-1) =105*(10-1) =1050-105 =945 . 问题是不是错了。
变成1*(3/2)*(4/3)*(5/4)*(7/6)*(8/7) =(1/2)*8 =4