(3/7) mũ 21 : (9/49) mũ 6

Question

(3/7) mũ 21 : (9/49) mũ 6

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Neala 5 years 2020-11-23T11:55:44+00:00 2 Answers 112 views 0

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  1. giahung
    0
    2020-11-23T11:56:49+00:00
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    Đáp án:

     

    Giải thích các bước giải:

    `(3/7)^21 : (9/49)^6`

    `=(3/7)^21 : (3/7)^12`

    `=(3/7)^9`

    học tốt

  2. Nick
    0
    2020-11-23T11:57:42+00:00
    Reply

    ${(\dfrac{3}{7})^{21}:(\dfrac{9}{49})^{6} }$

    =${(\dfrac{3}{7})^{21}:(\dfrac{3^2}{7^2})^{6} }$

    =${(\dfrac{3}{7})^{21}: [(\dfrac{3}{7})^2]^6}$

    =${(\dfrac{3}{7})^{21}:(\dfrac{3}{7})^{12} }$

    =($\dfrac{3}{7}$ )$^{9}$

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