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

Toán Lớp 6: (x-12)-4^5=2.4^8 24 chia hết cho x và x là số (-3).2^x-1=-11-[4^2-(2^2-1)] giúp e vs nhanh cho ctlhn ặ

Toán Lớp 6: (x-12)-4^5=2.4^8
24 chia hết cho x và x là số
(-3).2^x-1=-11-[4^2-(2^2-1)]
giúp e vs nhanh cho ctlhn ặ

Comments ( 2 )

  1. x−12)−45=2.48(x-12)-45=2.48
    (x−12)−1024=2.65536=131072(x-12)-1024=2.65536=131072
    x−12=131072+1024=132096x-12=131072+1024=132096
    x=132096+12x=132096+12
    x=132108x=132108
    Vậy x=132108

  2. (x – 12) – 4^5 = 2 . 4^8
    (x – 12) – 1024 = 2 . 65536 = 131072
    x – 12 = 131072 + 1024 = 132096
    x = 132096 + 12
    x = 132108
    Vậy x = 132108
    _________________________________________
    24 \vdots x
    => x ∈ Ư(24) = {1; 2; 3; 4; 6; 12; 24}
    Vậy x ∈ {1; 2; 3; 4; 6; 8; 12; 24}
    ___________________________________________
    (-3) . 2^(x – 1) = -11 – [4^2 – (2^2 – 1)]
    (-3) . 2^(x – 1) = -11 – [16 – 3]
    (-3) . 2^(x – 1) = -11 – 13
    (-3) . 2^(x – 1) = -24
    2^(x – 1) = (-24) : (-3) = 8
    2^(x – 1) = 2^3
    => x – 1 = 3
                x = 3 + 1
                x = 4
    Vậy x = 4

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

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