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

Toán Lớp 5: A/ 1/2 + 1/4 + 1/8 + 1/16 +… … … … … … … … … … + 1/1024 =====–..

Toán Lớp 5: A/ 1/2 + 1/4 + 1/8 + 1/16 +… … … … … … … … … … + 1/1024
=…………………………………………………………………..

Comments ( 2 )

  1. $\text{A=$\frac{1}{2}$ +$\frac{1}{4}$ +$\frac{1}{8}$ +$\frac{1}{16}$ +..+$\frac{1}{1024}$}$
    $\text{2A=1-$\frac{1}{1024}$ +A}$
    $\text{2A-A=1-$\frac{1}{1024}$ }$
    $\text{A=$\frac{1023}{1024}$ }$
    #Zie

  2. #huy
    2A = 1 – ( 1/2 + 1/4 + 1/8 + 1/16 + .. + 1/1024 ) – 1/1024
    2A= 1 – 1/1024 + A
    2A- A = 1- 1/1024
    A = 1 – 1/1024
    A = 1023/1024
     

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