giải giùm em bài 1 câu c,d

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giải giùm em bài 1 câu c,d
giai-gium-em-bai-1-cau-c-d

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Adela 4 years 2020-10-15T00:51:44+00:00 2 Answers 94 views 0

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  1. minhkhang
    0
    2020-10-15T00:53:15+00:00
    Reply

    Đáp án:

     `c) -20`

    `d) 3`

    Giải thích các bước giải:

     `c) 16“2/7:3/5-28“2/7:3/5`

    `=114/7.(5/3)-198/7.(5/3)`

    `=5/3(114/7-198/7)`

    `=5/3.(-12)=-20`

    `d) (81^11.(3^17))/(27^10.(9^15))`

    `=((3^4)^11.(3^17))/((3^3)^10.(3^2)^15)`

    `=3^61/3^60=3`

  2. Edana
    0
    2020-10-15T00:53:15+00:00
    Reply

    `c) 16 2/7:3/5-28 2/7:3/5`

    `=114/7.(5/3)-198/7.(5/3)`

    `=5/3(114/7-198/7)`

    `=5/3.(-12)`

    `=-20`

    `d) (81^11.(3^17))/(27^10.(9^15))`

    `=((3^4)^11.(3^17))/((3^3)^10.(3^2)^15)`

    `=3^61/3^60`

    `=3`

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Giải phương trình 1 ẩn: x + 2 - 2(x + 1) = -x . Hỏi x = ? ( )