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(1+1/2)*(1-1/2)*(1+1/3)*(1-1/3)········(1+1/99)*(1-1/99)=急要最简便的算法
题目详情
(1+1/2)*(1-1/2)*(1+1/3)*(1-1/3)········(1+1/99)*(1-1/99)=
急
要最简便的算法
急
要最简便的算法
▼优质解答
答案和解析
(1+1/2)*(1-1/2)*(1+1/3)*(1-1/3)········(1+1/99)*(1-1/99)
=1/2*3/2*2/3*4/3*3/4*5/4*.*98/99*100/99
=1/2*100/99
=50/99
=1/2*3/2*2/3*4/3*3/4*5/4*.*98/99*100/99
=1/2*100/99
=50/99
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