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

Toán Lớp 6: 3 mũ 2021+3 mũ 2021+3 mũ2021- 3 mũ x+ 8= 0

Toán Lớp 6: 3 mũ 2021+3 mũ 2021+3 mũ2021- 3 mũ x+ 8= 0

Comments ( 2 )

  1. 3^2021 +3^2021 +3^2021 -3^(x+8)=0
    3^2021 .3 -3^(x+8)=0
    3^2022 -3^(x+8)=0
    =>3^2022=3^x+8
    =>2022=x+8
    x=2022-8
    x=2014
    Vậy x=2014

  2. 3^2021 + 3^2021 + 3^2021 – 3^(x + 8) = 0
    3^( 2021 × 3 )  – 3^(x + 8) = 0
    3^2022 – 3^( x + 8 ) = 0
    3^2022 = 3^( x + 8 )
    2022 = x + 8
    2022 – 8 = x
    2014 = x 
    => x = 2014
    @ Rin

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