Kết quả tìm kiếm

A = \frac{\sqrt{x}-\sqrt{y}}{xy\sqrt{xy}}:[(\frac{1}{a}+\frac{1}{y})].\frac{1}{x+y+2\sqrt{xy}}+\frac{2}{(\sqrt{x}+\sqrt{y})^{3}}.(\frac{1}{\sqrt{x}}+\frac{1}{\sqrt{y}}) Tính A khi x = 2 - \sqrt{3}, y = 2 +\sqrt{3} B = \frac{2a\sqrt{1+x^{2}}}{\sqrt{a+x^{2}-x}} với x =...

The man talking to my mother over there is the principal. Ai cho mk cấu trúc của câu này vs

tìm lỗi sai 1.The doctors know that it would be difficult to save the life of the patient but they 'll do their best. 2.I don't believe it. It's three in the morning and the party still doesn't finish. 3.Jill and Eric had all their money stealing while they were on holiday. 4.Three miles are too...

Chứng minh số sau là số vô tỉ: m+\frac{\sqrt{3}}{n}(m,n \epsilon Q,n\mp 0)

1. Cm: a+b+c \geq \sqrt{ab}+\sqrt{bc}+\sqrt{ca} (a,b,c không âm) 2.Cm: a^{3}+ b^{3}+ c^{3}-3abc= \frac{1}{2}(a+b+c)[(a-b)^{2}+(b-c)^{2}+(c-a)^{2}] 3. Cm: \frac{x^{3}+y^{3}+z^{3}}{3}\geq xyz 4. Cm: \frac{a+b}{2}\geq \sqrt{ab}(a,b\geq 0) 5. Cm: \frac{a+b+c}{3}\geq \sqrt[3]{abc}(a,b,c\geq 0) 6. Cm...

1. Do you know how to make a ...... (speak) 2. His late arrival caused us much.... (convenient) 3. That man used to work with me when I lived in New York. => That's ........................... 4. My father used to take us to the circus when we lived in the city. => We...

Các chỉ hộ mk mấy cách đánh trọng âm vs

Nowadays, a lot of important inventions (1-carry out) by scientists (2-work) for large industrial firms. However there (3-be) still opportunities for other people (4-invent) various things. In Britain, there is a weekly TV program which (5-attempt) to show all the devices which people (6-invent)...

Chọn đáp án đúng 1. There are chances that Manchester United ...... the last match against Juventus. A.won B.will win C.has won D.would won 2. ....... to the national park before, Sue was amazed to see the geyser. A.being not B.not having been C.have not been D.having not been 3. ........ our...

1. I haven't seen that man here before. => It's .................................................. 2. It was so late that nothing could be done. => It was too ........................................ 3. The garage is going to repair the car for us next week. => We are going...

Mọi người hướng dẫn hộ mk mấy cách sử dụng giới từ, tính từ, trạng từ, động từ và cách điền mấy loại từ đấy trong đoạn văn.

1. He asked me to give him some advices for studying art.(tìm lỗi sai) 2. She was waiting nervous in the waiting room for the inteview.(tìm lỗi sai) 3. We couldn't drive because of the fog. => The fog prevent ................................. 4. She knows a lot more about it than I do. => I...

I. Điền từ thích hợp 1. I was born in New castle, a city in the North East Of England. Newcastle is ........ the bank of the River Tyne. It's quite big with a population of about 200,000 people. There is a cathedral and ..... university. There are five bridges ..... the biggest shopping centers...

1. Don't phone me between 10 am and 11 am because I will be ... at this time. 2. In spite of his age, Mr Tuan still runs 5 kms a day. -> Although ......................................... 3. She had an accident because of her carelessness. -> If she ....................................... 4. He...

I.Chọn đáp án đúng 1. Of the two boys, Dasvid is ................ A.fatter B.the fattest C.the fatter D.fattest 2. The harder she works, .......... money she earns. A.better B.much C.the more D.the most 3. Lucy answered the...

I. Điền giới từ vào chỗ trống 1. We've lost ... touch ... each other in 2008. 2. Don't phone us ... 7a.m and 8a.m. I am very busy at this time. 3. The orphan is brought ... by his uncle. 4. I think we should keep ... touch forever. 5. The beach is crowed ... the tourists in summer. 6. Can you...

on + phía hay in + phía ý ạ

1.I can't get my feet into these shoes. -) These shoes are too............. 2.He advised me not to study English lazily. (if)( viết lại câu)

I. Chia động từ 1. This knife is ... It can't cut anything. USE 2. Every week, there are two ... from Ha Noi to Nha Trang. FLY 3. Their office equipment needs to be ... MODERN 4. There is no easy ... to the problem...