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Newbie07
@Newbie07
August 2022
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Пж помогите с примером
1+1/10*11+1/11*12+1/12*13+1/13*14+1/14*15+1/15*16
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mmb1
Verified answer
1/n - 1/(n+1) = (n+1 - n)/n(n+1) = 1/n(n+1)
для одного примера 1/10*11= 1/10 - 1/11
1+1/10*11+1/11*12+1/12*13+1/13*14+1/14*15+1/15*16 = 1 + (1/10 - 1/11) + (1/11 - 1/12) + (1/12 - 1/13) + (1/13 - 1/14) + (1/14 - 1/15) + (1/15 - 1/16) = 1 + 1/10 - 1/16 = 1 + 8/80 - 5/80 = 1 + 3/80 = 1 3/80
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Answers & Comments
Verified answer
1/n - 1/(n+1) = (n+1 - n)/n(n+1) = 1/n(n+1)для одного примера 1/10*11= 1/10 - 1/11
1+1/10*11+1/11*12+1/12*13+1/13*14+1/14*15+1/15*16 = 1 + (1/10 - 1/11) + (1/11 - 1/12) + (1/12 - 1/13) + (1/13 - 1/14) + (1/14 - 1/15) + (1/15 - 1/16) = 1 + 1/10 - 1/16 = 1 + 8/80 - 5/80 = 1 + 3/80 = 1 3/80