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

Toán Lớp 6: thu gọn biẻu thức S = 1 + 2 + 2^2 + 2^3 + .. + 2^50

Toán Lớp 6: thu gọn biẻu thức
S = 1 + 2 + 2^2 + 2^3 + .. + 2^50

Comments ( 2 )

  1. S = 1 + 2 + 2^2 + 2^3 + .. + 2^50
    2S=2+2^2+2^3+2^4+…+2^51
    S=2^51-1

  2. ~ Bạn tham khảo ~
    S = 1+2+2^2+2^3 +…+2^50
    2S = 2+2^2+2^3 + 2^4+….+2^51
    2S -S = (2+2^2+2^3 + 2^4+….+2^51) – (1+2+2^2+2^3 +…+2^50)
    S = 2^51 – 1
    $#Vịt vàng$
     

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