Register Now

Login

Lost Password

Lost your password? Please enter your email address. You will receive a link and will create a new password via email.

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

Toán Lớp 8: S1=1+2+2^2+2^3+…+2^2021 giải thích luôn cho mình nhá

Toán Lớp 8: S1=1+2+2^2+2^3+…+2^2021 giải thích luôn cho mình nhá

Comments ( 2 )

  1. S1=1+2^2+2^3+…+2^2021
    2.S1=2+2^3+2^4+…+2^2022
    2.S1-S1=(2+2^3+2^4+…+2^2022)-(1+2^2+2^3+…+2^2021)
    S1=2^2022-1
    Vậy S1=2^2022-1

  2. S1=1+2+2^2+2^3+…+2^2021
    Mik đặt là S nha.
    2S=2+2^2+2^3+2^4+….+2^2022
    2S-S=(2+2^2+2^3+2^4+….+2^2022)-(1+2+2^2+2^3+…+2^2021)
    S=2^2022-1
    => S1=2^2022-1

Leave a reply

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