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

Toán Lớp 5: 1/2+1/4+1/8+1/16+1/32+1/64+1/128+1/1256

Tháng Ba 14, 2023 Toán học 0 Comments 0 views

Toán Lớp 5: 1/2+1/4+1/8+1/16+1/32+1/64+1/128+1/1256

Comments ( 2 )

  1. quynhthanhnhu
    quynhthanhnhu
    14 Tháng Ba, 2023 at 2:07 chiều
    Reply
    Gọi tích đó là A
    Ax2=1+1/2+1/4+1/8+1/16+1/32+1/64
    Ax2-A=1+1/2+1/4+1/8+1/16+1/32+1/64-1/2+1/4+1/8+1/16+1/32+1/64+1/128
    A=1-1/128+1/1256
    A=127/128+1/1256
    Còn bao nhiêu bn tính nốt

  2. diepbich93
    diepbich93
    14 Tháng Ba, 2023 at 2:07 chiều
    Reply
    Gọi tích đó là A
    Ax2=1+1/2+1/4+1/8+1/16+1/32+1/64
    Ax2-A=1+1/2+1/4+1/8+1/16+1/32+1/64-1/2+1/4+1/8+1/16+1/32+1/64+1/128
    A=1-1/128+1/1256
    A=127/128+1/1256
    A = 1247,1875/1256
     

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

Thanh THương

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