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222-9+11+12:2*14+14 = ? ( )

Toán Lớp 6: =1/{1.2}+1/{2.3}+1/{3.4}+…+1/{2020. “-

Toán Lớp 6: =1/{1.2}+1/{2.3}+1/{3.4}+…+1/{2020. “….

Comments ( 2 )

  1. 1/(1.2)+1/(2.3)+…+1/(2020+2021)
    =1-1/2+1/2-1/3+…+1/2020-1/2021
    =1- 1/2021
    =2020/2021
    Cho mk xin hay nhất please
    Thank you

  2. Giải đáp:
     
    Lời giải và giải thích chi tiết:
    -Đặt S = 1/1.2 + 1/2.3 +………+ 1/2020.2021
    => S = 1 – 1/2 + 1/2 – 1/3 +……….+ 1/2020 – 1/2021
    => S = 1 – 1/2021
    => S = 2020/2021

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222-9+11+12:2*14+14 = ? ( )

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