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

Toán Lớp 6: B= 1 – 2/3.5 – 2/5.7 – 2/7.9 =- 2/61.63 – 2/63.65

Tháng Mười Hai 25, 2022 Toán học 2 Comments 0 views

Toán Lớp 6: B= 1 – 2/3.5 – 2/5.7 – 2/7.9 -……..- 2/61.63 – 2/63.65

Comments ( 2 )

  1. huongtructram
    huongtructram
    25 Tháng Mười Hai, 2022 at 1:42 sáng
    Reply
    B = 1 – 2/( 3 . 5 ) – 2/( 5 . 7 ) – 2/( 7 . 9 ) – …. – 2/( 61 . 63 ) – 2/( 63 . 65 )
    B = 1 – ( 2/( 3 . 5 ) + 2/( 5 . 7 ) + 2/( 7 . 9 ) + …. + 2/( 61 . 63 ) + 2/( 63 . 65 ) )
    B = 1 – ( 1/3 – 1/5 + 1/5 – 1/7 + 1/7 – 1/9 + …. + 1/61 – 1/63 + 1/63 – 1/65 )
    B = 1 – ( 1/3 – 1/65 )
    B = 1 – 62/195
    B = 133/195
    Vậy , B = 133/195 .

  2. dongoclandiem
    dongoclandiem
    25 Tháng Mười Hai, 2022 at 1:42 sáng
    Reply
    B= 1 – 2/3.5 – 2/5.7 – 2/7.9 -……..- 2/61.63 – 2/63.65
    B = 1 – ( 2/3.5 + 2/5.7 + 2/7.9 +……..+ 2/61.63 + 2/63.65)
    B = 1 – ( 1/3 – 1/5 + 1/5 – 1/7 + 1/7 – 1/9 + ……. + 1/61 – 1/63 + 1/63 – 1/65 )
    B = 1 – ( 1/3 – 1/65)
    B = 1 – 62/195
    B = 133/195
    Vậy B = 133/195
     

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

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