99乘以(1-2分之1)乘以(1-3分之1)乘以(1-4分之1)乘以······乘以(1-99分之1)怎么算
问题描述:
99乘以(1-2分之1)乘以(1-3分之1)乘以(1-4分之1)乘以······乘以(1-99分之1)怎么算
急.
答
=99×1/2× 2/3×…… ×98/99 (前后约分)
=99× 1/99
=1