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

Toán Lớp 6: 2^x – 2^4 . 2^7 . 32 = 0 3^x + 3^x=2 = 270 help me i will say goodbye to this world

Toán Lớp 6: 2^x – 2^4 . 2^7 . 32 = 0
3^x + 3^x=2 = 270 help me i will say goodbye to this world

Comments ( 2 )

  1. 2^x – 2^4 . 2^7 . 32 = 0
    => 2^x – 2^4 . 2^7 . 2^5 = 0
    => 2^x – 2^(4 + 7 + 5) = 0
    => 2^x – 2^16 = 0
    => 2^x = 0 + 2^16
    => 2^x = 2^16
    => x = 16
    Vậy x = 16
    3^x + 3^(x + 2) = 270
    => 3^x + 3^x . 3^2 = 270
    => 3^x . 1 + 3^x . 9 = 270
    => 3^x . ( 1 + 9 ) = 270
    => 3^x . 10 = 270
    => 3^x = 270 : 10
    => 3^x = 27
    => 3^x = 3^3
    => x = 3
    Vậy x = 3
    #dtkc

  2. Giải đáp:
     x=16
    Lời giải và giải thích chi tiết:
    2^x – 2^4 . 2^7 . 32 = 0
    2^x – 2^4 . 2^7 . 2^5 = 0
    2^x – 2^(4+7+5) = 0
    2^x – 2^16 = 0
    => x= 16

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