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26 tháng 3 2023

5A

1B

3C

4D

\(#TyHM\)

23 tháng 12 2021

g: \(=\dfrac{x^2+2x-x^2-4x-2x+4}{x\left(x-2\right)\left(x+2\right)}=\dfrac{-4x+4}{x\left(x-2\right)\left(x+2\right)}\)

h: \(=\dfrac{2x^2+1-x^2+1-x^2+x-1}{\left(x+1\right)\left(x^2-x+1\right)}\)

\(=\dfrac{x+1}{\left(x+1\right)\left(x^2-x+1\right)}=\dfrac{1}{x^2-x+1}\)

23 tháng 12 2021

\(e,=\dfrac{1}{x-1}-\dfrac{2x}{\left(x^2+1\right)\left(x-1\right)}=\dfrac{x^2-2x+1}{\left(x^2+1\right)\left(x-1\right)}=\dfrac{\left(x-1\right)^2}{\left(x^2+1\right)\left(x-1\right)}=\dfrac{x-1}{x^2+1}\\ f,=\dfrac{3x-1}{2\left(3x+1\right)}+\dfrac{3x+1}{2\left(3x-1\right)}-\dfrac{6x}{\left(3x-1\right)\left(3x+1\right)}\\ =\dfrac{9x^2-6x+1+9x^2+6x+1-12x}{2\left(3x-1\right)\left(3x+1\right)}=\dfrac{2\left(3x-1\right)^2}{2\left(3x-1\right)\left(3x+1\right)}=\dfrac{3x-1}{3x+1}\)

\(g,=\dfrac{x}{x\left(x-2\right)}-\dfrac{x^2+4x}{x\left(x-2\right)\left(x+2\right)}-\dfrac{2}{x\left(x+2\right)}\\ =\dfrac{x^2+2x-x^2-4x-2x+4}{x\left(x-2\right)\left(x+2\right)}=\dfrac{-4x+4}{x\left(x-2\right)\left(x+2\right)}\\ h,=\dfrac{2x^2+1-x^2+1-x^2+x-1}{\left(x+1\right)\left(x^2-x+1\right)}=\dfrac{x+1}{\left(x+1\right)\left(x^2-x+1\right)}=\dfrac{1}{x^2-x+1}\)

1 tháng 2 2023

1 in

2 with

3 in

4 in

5 in/for

6 of/to

7 in

8 on

1 tháng 2 2023

1. That is the nicest thing you have ever said

2. That is the most exciting film I have ever seen

3. This is the most unreliable car they have ever bought

4. He's the funniest man she has ever worked with

5. That is the most expensive present he has ever received

6. That is the best meal I have ever had

1 tháng 2 2023

1, That is the nicest thing you have ever said.

2, That is the most exciting film I have ever seen.

3, This is the most unreliable car they have ever bought.

4, He is the funniest man she has ever worked with.

5, That is the most expensive present he has ever received.

6, That is the best meal I have ever had.

6 tháng 12 2021

đang thi mik ko giúp đc, xin lỗi nha

6 tháng 12 2021

Bh bạn thi xong vậy ạ 

13 tháng 1 2022

Lỗi rùi, cập nhật lại nha

28 tháng 12 2022

7  haven't seen/saw/was taking

9 meet

11 nagging/trying

12 have been cleaning/haven't finished

13 have......done/met

14 telling/get

15 to use