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

Toán Lớp 6: tìm n để 30+4 chia hết cho n-1

Toán Lớp 6: tìm n để 30+4 chia hết cho n-1

Comments ( 1 )

  1. $\text{30 + 4 = 34}$
    $\text{Vì 34 $\vdots$ n + 1}$
    $\text{⇒ n + 1 ∈ Ư(34) = {1;2,17,34} }$
    $\text{Với n + 1 = 1}$
    $\text{⇔ n = 0}$
    $\text{Với n + 1 = 2}$
    $\text{⇔ n = 1}$
    $\text{Với n + 1 = 17}$
    $\text{⇔ n = 16}$
    $\text{Với n + 1 = 34}$
    $\text{⇔n = 33}$
    $\text{Vậy n ∈ {0,2,16,33} }$

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

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