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

Toán Lớp 6: -17/2.4 – 17/4.6- 17/100.102

Toán Lớp 6: -17/2.4 – 17/4.6…. 17/100.102

Comments ( 2 )

  1. 17/(2.4)-17/(4.6)-…-17/(100.102)
    =-(17/(2.4)+17/(4.6)+…+17/(100.102))
    =-17/2(2/(2.4)+2/(.4.6)+…+2/(100.102))
    =-17/2(1/2-1/4+1/4-1/6+…+1/100-1/102)
    =-17/2[1/2+(-1/4+1/4)+…+(-1/100+1/100)-1/102]
    =-17/2(1/2-1/102)
    =-17/2.25/51
    =-25/6
    $\text{@ThanhTruc2008}$

  2. Giải đáp:
    -17/2.4 – 17/4.6 – 17/6.8 -…..-17/100.102
    =-17/2.(2/2.4+2/4.6+…+2/100.102)
    =-17/2.(1/2-1/4+1/4-1/6+…+1/100-1/102)
    =-17/2.(1/2-1/102)
    =-17/2.(51/102-1/102)
    =-17/2.50/102
    =-25/6
                                   CHÚC BẠN HỌC TỐT VÀ NHỚ VOTE MÌNH 5 SAO NHA !
     

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

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