(1-1/2)x(1-1/3)x(1-1/4)x...x(1-1/999)x(1-1/1000)分之2000-1990+
(1-1/2)x(1-1/3)x(1-1/4)x...x(1-1/999)x(1-1/1000)分之2000-1990+1980-1970+...+20-10
计算
计算
赞 chenweifyah 幼苗
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(2000-1990+1980-1970+...+20-10)/[(1-1/2)x(1-1/3)x(1-1/4)x...x(1-1/999)x(1-1/1000)]
=(10+10+10+...+10)/(1/2x2/3x3/4x.x998/999x999/1000)
=(10x100)/(1/1000)
=1000x1000
=1000000
=(10+10+10+...+10)/(1/2x2/3x3/4x.x998/999x999/1000)
=(10x100)/(1/1000)
=1000x1000
=1000000
1年前
5
你能帮帮他们吗
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