(-1+1/2)*(-1+1/3).*(-1+1/100)

(-1+1/2)*(-1+1/3).*(-1+1/100)
(-1+1/2)*(-1+1/3).*(-1+1/100)

(-1+1/2)*(-1+1/3).*(-1+1/100)
(-1+1/2)*(-1+1/3).*(-1+1/100)
=(-1/2)*(-2/3).*(-99/100)
=-1/100

2到100是99个数，那么这个算式是99个负数相乘，结果是负数
(-1+1/2)*(-1+1/3).....*(-1+1/100)
=﹣ 1／2×2／3×3／4······×99／100 ————分子分母约分
=﹣1／100