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1. Thank you. This information ________ me a lot.

A. helps B. benefits C. volunteer D. Both A & B are correct.

2. All of these books and clothes will be ________ to children in Ha Giang

. A. encouraged B. donated C. clean D. All are correct.

3. My mom often asks me to ________ my room on the weekend.

A. stay B. volunteer C. make D. clean up

4. Students often make postcards and sell them to ________ to help the poor.

A. Ø B. raise funds C. raise money D. Both B & C are correct.

5. Try to study harder and be more active to ________ to your life.

A. make a difference B. raise money C. clean up D. donated

6. My sister works as a volunteer at a _______ in the city.

A. donate B. shelter C. community D. homeless

7. Nowadays, a lot of ________ live in a nursing home.

A. homeless people B. elderly people C. street children D. disabled people.

8. There are a lot of ________ after the storm.

A. homeless people B. elderly people C. nursing home D. None are correct.

9.Many ... gifts will be given to the poor in lao cai this evening

A. blood B. charitable C. dirty D. flooded

10. On Friday àd Saturday, 100 ... for free chicken noodle soup are given to the poor by Mr Khanh in Ha Noi

A. coupons B. mentors C. tutors D. blanket

11. We are collecting ... and clothes for street children

A. dirty B. blood C. rubbish D. blankets

12. Many ... are ... to protect the environment

A. non-profit orgnisations - provide B. tutor - establised

C. non-profit orgnisations - established D. coupons - donated

13. This program will ... life skills for young people

A. provide B. be forced C. graffiti D. establish

14. She is very .... . She always helps others

A. dirty B. kind - hearted C. charitable D. flooded

15. Can you help me ... these clothers.

A.tutor B. establish C. provide D. sort

C

c

mong bạn tick

\(x.(x^2-2x+1)=x(x-1)^2\)

11)

\(\dfrac{2x}{x+2}\) \(\times\) \(\dfrac{x^{2^{ }}-4}{4}\) - \(\dfrac{x}{2}\) 

= \(\dfrac{2x}{x+2}\) \(\times\) \(\dfrac{x^2-2^2}{4}\) - \(\dfrac{x}{2}\) 

= \(\dfrac{2x}{x+2}\) \(\times\) \(\dfrac{\left(x-2\right)\left(x+2\right)}{4}\) - \(\dfrac{x}{2}\) 

= \(\dfrac{x\left(x-3\right)}{2}\)

3. She said I should ask a lawyer.

4. Mrs Linh asked me to give Tuan this book.

thay \(x=3-2\sqrt{2}\) vào P ta có:

\(\dfrac{x+8}{\sqrt{x}+1}=\dfrac{3-2\sqrt{2}+8}{\sqrt{3-2\sqrt{2}}+1}=\dfrac{11-2\sqrt{2}}{\sqrt{2}-1+1}=\dfrac{11-2\sqrt{2}}{\sqrt{2}}\)

\(b,x=3-2\sqrt{2}=\left(\sqrt{2}-1\right)^2\)

Thay vào P, ta được:

\(P=\dfrac{3-2\sqrt{2}+8}{\sqrt{\left(\sqrt{2}-1\right)^2}+1}=\dfrac{11-2\sqrt{2}}{\sqrt{2}}=\dfrac{11\sqrt{2}-4}{2}\)

b: Thay \(x=3+2\sqrt{2}\) vào P, ta được:

\(P=\dfrac{3+2\sqrt{2}+8}{2+\sqrt{2}}=\dfrac{18-7\sqrt{2}}{2}\)

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

Tl

Mấy bài này nhìn khó quá 

#Kirito

làm cả 5 bài luôn hả giang

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