Viết lại câu nha
She started work three months ago
Mình đg kt 15 p nha cần gâp ạ
K
Khách
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Những câu hỏi liên quan
6 tháng 8 2023
a: \(Q=\dfrac{\left(\sqrt{x}+1\right)\left(\sqrt{x}+2\right)-2\sqrt{x}\left(\sqrt{x}-2\right)-5\sqrt{x}-2}{x-4}:\dfrac{\sqrt{x}\left(3-\sqrt{x}\right)}{\left(\sqrt{x}+2\right)^2}\)
\(=\dfrac{x+3\sqrt{x}+2-2x+4\sqrt{x}-5\sqrt{x}-2}{x-4}\cdot\dfrac{\left(\sqrt{x}+2\right)^2}{\sqrt{x}\left(3-\sqrt{x}\right)}\)
\(=\dfrac{-x+2\sqrt{x}}{\sqrt{x}-2}\cdot\dfrac{\sqrt{x}+2}{\sqrt{x}\left(3-\sqrt{x}\right)}\)
\(=\dfrac{-\sqrt{x}\left(\sqrt{x}-2\right)}{\sqrt{x}\left(\sqrt{x}-2\right)\cdot\left(-1\right)}\cdot\dfrac{\sqrt{x}+2}{\sqrt{x}-3}=\dfrac{\sqrt{x}+2}{\sqrt{x}-3}\)
b: Khi x=4-2căn 3 thì \(Q=\dfrac{\sqrt{3}-1+2}{\sqrt{3}-1-3}=\dfrac{\sqrt{3}+1}{\sqrt{3}-4}=\dfrac{-7-5\sqrt{3}}{13}\)
c: Q>1/6
=>Q-1/6>0
=>\(\dfrac{\sqrt{x}+2}{\sqrt{x}-3}-\dfrac{1}{6}>0\)
=>\(\dfrac{6\sqrt{x}+12-\sqrt{x}+3}{6\left(\sqrt{x}-3\right)}>0\)
=>\(\dfrac{5\sqrt{x}+9}{6\left(\sqrt{x}-3\right)}>0\)
=>căn x-3>0
=>x>9
22 tháng 7 2021
Viết lại câu:
I have learn English for three years.
Viết lại: I started..............
=> I started learning / to learn English three years ago
TC
1 tháng 3 2019
1: we started living here fifteen years ago .
-> we have ...lift here for fifteen years...........................................
2: the last time she visited me was five years ago.
-> she hasn't ..visited me for five years........................................
3: we haven't visited my grandfather for two months .
-> the last time ....we visited my grandfather was two months ago...................................
4 : i have studied English for three years .
-> i began ....study English three years ago............................................
KN
8 tháng 3 2020
1: we started living here fifteen years ago .
-> we have .lived here fifteen years ago ..............................................
2: the last time she visited me was five years ago.
-> she hasn't ...visited me for five years ago........................................
3: we haven't visited my grandfather for two months .
-> the last time ...we ...visited my grandfather was two months ago..................................
4 : i have studied English for three years .
-> i began ....studying English three years ago .............................................
KN
8 tháng 3 2020
1:this is the first time he has been here.
=>he has...never been here before ............
2,i started playing tennis 3 months ago.
=>i have........played tennis 3 months ago..................
3,they began to plant trees when it stopped raining.
=>they have....planted trees when it stopped raining..................
4,she has never eaten this fruit before.(thấy sai sai)
=> she is.........................
5,it's three days since my uncle left here.
=>my uncle has....left here three days ago .......................
6,the last time i saw him was two weeks ago.
=>i have.........seen him two week ago.......................
kiểm tra không hỏi nha
Đức ơi teo chơi bẩn hỏi bài trong giờ kiểm tra nè mách cô đi haha
* Đinh Minh Đức