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    Показательные уравнения, неравенства

    ЕленаКМ
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    Показательные уравнения, неравенства
    3^(x-3) =27
    6
    7^(x+2)- 14*7^x=5
    -1
    2^x=0,5
    -1
    5^(x+1)+5^x+ 5^(x-1)=155
    2
    (1/2)^(x-3)˂8
    х>0
    (1/2)^((x+3)/ (x-2))≤16
    1≤х˂2
    25^x=625
    2
    1,5^(3-2x)˂4/9
    х>0,5
    4^x-3*2^x-4≥0
    х≥2
    2^x=8√2
    3,5