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

Toán Lớp 6: tìm x thuộc N 2*5 mũ x+1-1100=6*5 mũ 2

Toán Lớp 6: tìm x thuộc N
2*5 mũ x+1-1100=6*5 mũ 2

Comments ( 2 )

  1. Ta có : 
    2 xx $5^{x + 1 – 1100}$ = 6 xx 5^2
    2 xx $5^{x + 1 – 1100}$= 6 xx 25
    2 xx $5^{x + 1 – 1100}$ = 150
    2 xx $5^{x + 1 – 1100}$ = 150
    $5^{x + 1 – 1100}$ = 150 : 2
    $5^{x + 1 – 1100}$ = 75
    $5^{x – 1099}$ = ?
    x = ∅
    Đề lỗi

  2. 2 nhân 5 mũ x+1-1100=6 nhân 5 mũ 2
    =$2.5^{x+1-1100}$ =6.$5^{2}$ 
    5^{x+1-1100}$=150:2
    5^{x+1-1100}$=75
    =>x∉Q

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

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