Giải phương trình :

a, \(\sqrt{1-12x+36x^2}=5\)

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

c, \(\sqrt{2x+5}=\sqrt{1-x}\)

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

Bài 3: Cho Q= . Tìm Min \(\sqrt{Q}\)

Bài 1: Cho P=\(\frac{x+16}{\sqrt{x}+3}\) . Tìm Min P

Bài 2: Cho M=\(\frac{2}{x+\sqrt{x}+1}\) . Tìm Max M

1.Harry lost his iPol so he is looking miserable.

\(\Rightarrow\) If Harry ............................................................

2.It is essential that this door is kept unlocked.

\(\Rightarrow\)On no account ................................................................

3.Immediately afterhis appointment to the post, the new editor fell ill.

\(\Rightarrow\)No sooner ..............................................................................................

4.I just need a bit of peace and quiet.

\(\Rightarrow\)All ..........................................................

5.We will not delay our voyage whether there is rain or not.

\(\Rightarrow\) Regardless ...........................................................................

6.Since she could not get through to thepolice, she ran next door for help.

\(\Rightarrow\)Not being .........................................................................................

7.It seems that no one predicted the correct result.

\(\Rightarrow\)No one seems ......................................................................

8.They could only get to the island if they hired a single-engine aircraft.

\(\Rightarrow\)Only by .....................................................................................................

9.Jack and his father are very similar , aren't they?

\(\Rightarrow\)Jack really takes ...........................................................?

10.In Irish my thology, people said a meteor was asoul passing form purgatory to heaven.

\(\Rightarrow\)In Irish my thology, a meteor ...............................................................................................

1.How likely is it that the film will win an Oscar?(CHANCES)

\(\Rightarrow\)What ................................................ the film winning an Oscar?

2.You should go for an eye test if you are struggling to read the newsparper.(TESTED)

\(\Rightarrow\)You should ....................................... if you are struggling to read the newsparer.

3.Why did nobody tell me that the meeting had been cancelled?(INFORMED)

\(\Rightarrow\)Why ....................................................... the cancellation of the meeting?

4.Do you think you could help me fill in this application form?(WONDERING)

\(\Rightarrow\)I was ...................................... me a hand filling in this application form?

5.It is possible that the thieves entered the building by forcing a window at the back.(INTO)

\(\Rightarrow\)The thieves may ........................................... the building through a window at the back.

6.Once Noriko had performed her solo , there was no reason for us to stay for the rest of the concert.(POINT)

\(\Rightarrow\)There was .......................................................... for the rest of the concert once Noriko had performed her solo.

7.The results show that attendance has risen dramatically during the last years.(RISE)

\(\Rightarrow\)The results show a ............................................. during the last years.

8."Remember to write or phone ", Marta said as she waved goodbye to her friend.(TOUCH)

\(\Rightarrow\)"Don't ............................," Marta said as she waved goodbye to her friend.

9.I only realized that I'd forgotten my wallet when I got to the station (ARRIVED)

\(\Rightarrow\)It was not ...................................................... the station that I realized I'd forgotten my wallet.

10.Driving without a seatbelt is illegal in most European countries.(AGAINST)

\(\Rightarrow\)It is ............................................ without a seatbelt in most European countries.

Chia 1,5g hỗn hợp bột Fe ,Al , Cu thành hai phần bằng nhau

a, Lấy phần 1 hòa tan bằng dung dịch HCl thấy còn lại 0,2g chất rắn không tan và có 448ml khí bay ra (đktc). Tính khối lượng Al trong mỗi phần

b, Lấy phần 2 cho vào dung dịch hỗn hợp \(AgNO_3\) 0,08M và \(Cu\left(NO_3\right)_2\) 0,5M.Sau phản ứng kết thúc thu được chất rắn A và dung dịch B .Tính khối lượng chất rắn A và \(C_M\) dung dịch B

Cho hỗn hợp chứa 0,2mol Zn và 0,2 mol Fe tác dụng với dung dịch hỗn hợp \(Cu\left(NO_3\right)_2\) 2M và \(AgNO_3\) 1M.Tính m chất rắn

Choose the word which best fits each gap of the passage :

The Cheetah

The cheetah is an unsual member of te cat family that has many (1).................... characteristics . It is ideally suited to its African grassland habitant , but faces challenges to its survival in the (2)........................ .

It is exceptional in its speed , while lacking strong climbing abilities . It is the fastest land animal , reaching speeds (3)................ 112 and 120 kilometres per hour, in short bursts. It (4).....the ability to accelerate from 0 to 100 kilometres per hour in three seconds, faster than most supercars.(5)........ the cheetah is a sprinter it cannot keep (6)..........its amazing speeds for long periods of time.

The cheetah is a vulnerable species. Of all the big cats, it is the (7).................able to adapt to new environments. Indeed, all cheetahs are so closely related that they have very similar genes, (8)........... makes them susceptible to diseases. They have always proved difficult to breed in captivity, although recently a few zoos have managed to (9)................in this. Once widely hunted for its fur, the cheetah now suffers more from the loss of (10)........................habitat and prey.

1, A.scarce B.unique C.typical D.dangerous

2, A.past B.now C.today D.future

3, A.of B.between C.through D.below

4, A.is B.makes C.has D.does

5, A.Although B. Nevertheless C.Despite D. Even

6, A. with B.uo C.on D.for

7, A.little B.less C.only D. least

8, A.it B.what C.any D.which

9, A.overcome B.succeed C.achieve D.win

10, A.both B.neither C.the D.either

Cho a(g) Na vào 200 g dung dịch \(Al\left(SO_4\right)_3\) 1,71% . Sau phản ứng thu được 0,78 g kết tủa .Tính a (g)

Cho 25,2 g Mg vào 1 lít hỗn hợp chứa \(Cu\left(NO_3\right)_2\) 0,3M ; \(Fe\left(NO_3\right)_3\) 0,3M ; \(Al\left(NO_3\right)_3\) 0,2M ; \(AgNO_3\) 0,2M . Tính m chất rắn tạo thành