99*(1-1/2)*(1-1/3)*(1-1/4)*.*(1-1/99)
=99x1/2x2/3x3/4x..x98/99
=99x1/99
=1
99*(1-1/2)*(1-1/3)*(1-1/4)*.*(1-1/99)簡算
99*(1-1/2)*(1-1/3)*(1-1/4)*.*(1-1/99)簡算
數(shù)學人氣:967 ℃時間:2020-08-06 14:07:31
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