Giúp mk với ạ cảm ơn nhìu

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Giúp mk với ạ cảm ơn nhìu
giup-mk-voi-a-cam-on-nhiu

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Mít Mít 4 years 2020-10-13T19:07:12+00:00 2 Answers 94 views 0

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  1. Vodka
    0
    2020-10-13T19:08:39+00:00
    Reply

    A,10/20>90/10

    B,4/100=2/200

    C,2/30<3/20

    D,(0,1)^20>(0,3)^40

    Đây

     

  2. Sigrid
    0
    2020-10-13T19:09:05+00:00
    Reply

    $a$) Ta có:

    $10^{20} = (10^2)^{10} = 100^{10}$

    Vì : $100^{10} > 90^{10} ⇒ 10^{20} > 90^{10}$.

    $b$) Ta có:

    $2^{200} = (2^2)^{100} = 4^{100}$

    $⇒ 4^{100} = 2^{200}$.

    $c$) Ta có:

    $2^{30} = (2^3)^{10} = 8^{10}$

    $3^{20} = (3^2)^{10} = 9^{10}$

     Vì : $8^{10} < 9^{10} ⇒ 2^{30} < 3^{20}$.

    $d$) Ta có:

    $(0,3)^{40} = [(0,3)^2]^{20} = (0,09)^{20}$

    Vì : $(0,1)^{20} > (0,09)^{20} ⇒ (0,1)^{20} > (0,3)^{40}$.

     

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