take off
look after
find out
try on
hurry up
sit down
get on
look up
fill in
put out
\(\left(\frac{1}{2+2\sqrt{x}}+\frac{1}{2-2\sqrt{x}}-\frac{x^2+1}{1-x^2}\right)\left(1+\frac{1}{x}\right)\)
\(=\left(\frac{2-2\sqrt{x}+2+2\sqrt{x}}{\left(2+2\sqrt{x}\right)\left(2-2\sqrt{x}\right)}-\frac{x^2+1}{1-x^2}\right)\left(1+\frac{1}{x}\right)\)
\(=\left(\frac{4}{4-4x}-\frac{x^2+1}{\left(1-x\right)\left(1+x\right)}\right)\left(1+\frac{1}{x}\right)\)
\(=\left(\frac{1+x-x^2-1}{\left(1-x\right)\left(1+x\right)}\right)\left(1+\frac{1}{x}\right)=\frac{x\left(1-x\right)}{\left(1-x\right)\left(1+x\right)}.\frac{x+1}{x}=1\)
rút gọn biểu thức căn 10 - căn 2/căn 5 - 1 + 2 - căn 2/căn 2 - 1
Chuyển sang Câu bị động theo 2 CÁCH
1. He sent the girl a letter.
(1) =>
(2) =>
2. She is showing her friends the new computer.
(1) =>
(2) =>
3. Her mother often tells the girl tale stories.
(1) =>
(2) =>
4. They will pay you $500.
(1) =>
(2) =>
TENSES | EXAMPLES | SIGNAL WORDS |
Present Simple Tense | 1. We go to school. 2. 3. |
|
Present Continuous Tense | 1. 2. 3. |
|
Present Perfect Tense
| 1. 2. 3.
|
|
Past Simple Tense
| 1. 2. 3. |
|
Past Continuous Tense | 1. 2. 3. |
|
Past Perfect Tense | 1. 2. 3. |
|
Future Simple Tense
| 1. 2. 3. |
|
TENSES | EXAMPLES | SIGNAL WORDS |
Present Simple Tense | 1. He speaks English 2. 3. |
|
Present Continuous Tense | 1. 2. 3. |
|
Present Perfect Tense
| 1. 2. 3. |
|
Past Simple Tense
| 1. 2. 3. |
|
Past Continuous Tense | 1. 2. 3. |
|
Past Perfect Tense | 1. 2. 3. |
|
Future Simple Tense
| 1. 2. 3. |
|
Cho các số thực dương x,y,x thỏa mãn \(x^2+y^2+z^2\le3xyz\) . Tìm Max P=\(\frac{x^2}{x^4+yz}+\frac{y^2}{y^4+xz}+\frac{z^2}{z^4+xy}\)
Ptđt thành nhân tử:
a. 11-2x^2
b.x- 2 căn x
c.căn x-3x
d.x^2 + 2 căn 2x+2
e. x-4 căn x+4
Change these sentences into passive voice
1.Mrs Green went to Ho Chi Minh City( 2 cách)
=>
=>
2.Mai comes to class late( 2 cách)
3.Jack arrived home with some friend( 2 cách)
4.Mr Pike ran very slowly( 2 cách)
1 + 1 =
2 + 2 =
2/It isn’t Saturday. She doesn’t go to the beach. (type 2) =>_____________________________________________
Tính : \(2-\sqrt{2}\)
