大家来解一下数学题(1+1/2)x(1-1/2)x(1+1/3)x(1-1/3)x...x(1+1/99)x(1-1/9
3个回答
=1/2*3/2*2/3*4/3*3/4*5/4*...*98/99*100/99
中间所有前后两个上下抵消,只剩小第一项和最后一项
=1/2 * 100/99
=50/99
相关问题
(1-1/2)x(1+1/2)x(1-1/3)x(1+1/3)x.x(1-1/99)x(1+1/99)结果是等于50/9
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