P = \(\frac{x\sqrt{x}-1}{x-\sqrt{x}}-\frac{x\sqrt{x}-1}{x+\sqrt{x}}+\frac{x+1}{\sqrt{x}}\)

a) Rút gọn P

b) Tìm x, để P = \(\frac{9}{2}\)

A = \(\frac{2\sqrt{x}-9}{x-5\sqrt{x}+6}-\frac{\sqrt{x}+3}{\sqrt{x}-2}-\frac{2\sqrt{x}+1}{3-\sqrt{x}}\)

a) Rút gọn

b) Tìm x để A < 1

Rút gọn:

\(\frac{1}{\sqrt{3}+\sqrt{3}}-\frac{1}{\sqrt{3}-\sqrt{3}}\)

Viết lại câu:

1. She was unable to warn her mother that she would be late because the telephone was broken (DUE TO)

2. Mary Smith’s decided to give up her job since she had to take care of her children (BECAUSE OF)

3. I could finish the project owing to his help (BECAUSE)

4. Now that we have labor - saving devices, housework is no longer a burden (THANKs TO)

5. Before we went on holiday, we prepared everything carefully

6. Before it is baked, the cake should be carefully prepared

7. The ointment can be applied where it is needed

8. You should negotiate a lot before you buy a new car.

9. When they are frightened, tortoises often hide inside their shells

10. Once they are purchased, the swimsuits cannot be returned

11. Although she was wearing a sweater, she still felt cold

12. When they build nests during spring nesting season, Canadian geese are fierce terrestrial

13. Students must not speak Vietnamese when they are in an English lesson

14. Soon after I had given him the money, he gave it to the old man.

15. Before he left on his trip, he gave his plan to his wife

-> Before .................

16. Although I was very tired, I didn’t sleep

-> no matter how ...................

17. The application will at least be reviewed if it is submitted by the fifteenth of the month

-> if submitted ....................

Sửa lỗi:

1. (In the) sixteenth century, (it was thought) that a compass needle (pointed) north (because) some mysterious influence of the star

2. (During) lava cools (exceptionally) fast, (it forms) a natural glass (called) obsidian

3. (Since) it’s acute sense of (smell), (the) blood-hound is often (used in) tracking

4. Art critics (do not all) agree on what (are the qualities) that (make) a painting (great)

5. A test pilot (tries out) new (kinds of ) aircraft (to determine ) if (are they safe)

6. Opine Bernards are (too) good at (following) the scent of humans, even in snow, that they (are used) by ski. Paltrow’s (as) rescue dogs

7. (Desiring) to leave their own marks of identify inside the White House, most presidents wives (redecorate) at least some portion of (its) room (as soon as arrival) there

8. The prices of accommodation (are) (as) big that many people (cannot) afford to (buy) a house

Cho d1: y = \(-\frac{1}{3}x\) và d2: 3x - 2

a) vẽ d1 và d2

b) tìm m để đường thẳng y = (2m - 3)x + 3m -2 cắt d2 tại điểm có hoành độ bằng 1

c) Xác định đường thẳng y = ad + b, biết d3//d1 và cắt d2 tại hoành độ bằng 2