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

Toán Lớp 5: Tìm X: (X + 1/2) + (X+ 1/4) + (X+1/8) + (X+1/16) = 1

Toán Lớp 5: Tìm X:
(X + 1/2) + (X+ 1/4) + (X+1/8) + (X+1/16) = 1

Comments ( 2 )

  1. Tìm X:
      (X + 1/2) + (X+ 1/4) + (X+1/8) + (X+1/16) = 1
    =(1/2+1/4+1/8+1/16)+X=1
    =7/8+X=1
                X=1-7/8
                X=1/8
    Vậy X=1/8

  2. [x+1/2]+[x+1/4]+[x+1/8]+[x+1/16]=1
    4x+(1/2+1/4+1/8+1/16)=1
    4x+15/16=1
    4x=1-15/16
    4x=1/16
    x=1/64
    xin hay nhất

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