Tại sao khi đau ốm chúng ta cần phải đi khám bác sĩ kịp thời và phải uống thuốc theo đúng chỉ định của bác sĩ

\(\frac{2}{3}\sqrt{3}-\frac{1}{4}\sqrt{18}+\frac{2}{5}\sqrt{2}-\frac{1}{4}\sqrt{12}\)

Fill the blanks with a preposition and the correct form of the verbs below: go,not go,leave,get,do be,study,have,complete,draw,steal,not be,help,know,live,wait,smoke,disscuss,not,answer,find

1.Henry is excited...for India 11.Laura had a good reason...to class yesterday

2.You're capable...better work 12.The man was guilty...from his employer

3.I've no excuse...late 13.I apologized...the better

4.I'm accustomed....a big breakfast 14.People were annoyed....able to see it probably

5.The rain prevented...the work 15.You ought to book in advance.You can't rely...

a hotel room

6.Instead...Peter went to a ball game with his friends 16.He believed...things openly

7.Thank you...me carry the box 17.He objected....for so long

8.Mrs Grant insisted....the whole truth 18.I don't approve....I think it's a bad habit

9.He showed us how to get to his house... a map 19.I've succeeded....hold of the phone N0

10.You should take advantage...here 20.I'm thinking.....to France,this summer

Add the correct form of the most suitable verbs to make the correct phrasal verbs.There are more words than needed.(break,come,do,drop,get,jump,lie,settle,throw,tick,turn,work)

1.Mike's interest in practicing karate......off rather quickly and the boy started to look for a new hobby to take up.

2.The exact cost of the whole venture isn't known yet,but our best accountants have been trying to....it out

3. There was no sign indicating that the cottage had been....into,yet,the owner was sure his percious paintings had been stolen.

4.There's no hot chocolate on the menu,sir.That's all right.I can...with a cup of tea instead.

5.I don't quite like the new appentice's approach. He seems to....down on the job

6.We owe this marvelous wooden church building to the first Christian pioneers who....down in this area in the 16th century.

7.Our stay in the town will certainly be a good chance for Michael to visit his grandfather's birthplace, so I'm sure he will....at the opportunity

Tính:

1) \(2\sqrt{2}\cdot\left(\sqrt{3}-2\right)+\left(1+2\sqrt{2}\right)^2-2\sqrt{6}\)

2) \(\frac{\sqrt{2}+\sqrt{3}+\sqrt{6}+\sqrt{8}+\sqrt{16}}{\sqrt{2}+\sqrt{3}+\sqrt{4}}\)

Tìm giá trị nhỏ nhất của biểu thức \(P=\frac{x^2}{y^2}+\frac{y^2}{x^2}-3\left(\frac{x}{y}+\frac{y}{x}\right)+5\) (với \(x\ne0,y\ne0\))

Chứng minh rằng:

Với a+b+c=0 thì a^4+b^4+c^4=2(ab+bc+ca)^2

Chứng minh rằng:

\(\frac{a}{ab+a+1}+\frac{b}{bc+b+1}+\frac{c}{ac+c+1}=1\) biết abc=1