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1+1*0.99+1*0.99*0.99+1*0.99*0.99*0.99重复680次,等于多少

题目详情
1+1*0.99+1*0.99*0.99+1*0.99*0.99*0.99重复680次,等于多少
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答案和解析
1+1*0.99+1*0.99*0.99+1*0.99*0.99*0.99重复680次=1+0.99+0.99²+0.99³+.+0.99^680=(1-0.99^681)/(1-0.99)=0.0010655345123075663446558509623354./0.01=0.10655345123075663446558509623354.