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

Toán Lớp 6: 5^x.(5^3)^4=625 cứu mình với cảm ơn

Toán Lớp 6: 5^x.(5^3)^4=625
cứu mình với cảm ơn

Comments ( 1 )

  1. 5^x .(5^3)^{4}=625
    <=>5^x . 5^{3.4} = 5^4
    <=>5^x . 5^12 = 5^4
    <=>5^x = 5^4 : 5^12
    <=> 5^x = 5^-8
    <=> x=-8
    Vậy x=-8

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

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