K
Khách

Hãy nhập câu hỏi của bạn vào đây, nếu là tài khoản VIP, bạn sẽ được ưu tiên trả lời.

1, I' d like to stay at home at home instead of............to the cinema a.go b.going c.went d.to go 2.i would rather............unemployed than.............in that factory a.to be/to work b. be/work c. being/work d.being/working 3. mary was so angry that she..........to see the manager a.demanded b. hoped c. risked d. stopped 4. i don,t think that red dress...........her a. suits b.matches c.cheers d.agrees 5. the weather is............awful that i don,t like going out this...
Đọc tiếp

1, I' d like to stay at home at home instead of............to the cinema

a.go b.going c.went d.to go

2.i would rather............unemployed than.............in that factory

a.to be/to work b. be/work c. being/work d.being/working

3. mary was so angry that she..........to see the manager

a.demanded b. hoped c. risked d. stopped

4. i don,t think that red dress...........her

a. suits b.matches c.cheers d.agrees

5. the weather is............awful that i don,t like going out this evenning

a. such b. so c. too d. very

6. let your name be written.............the sheet of raper

a.by b. on c. with d. of

7. my father had a worker............a fence round our garden

a. make b. making c. to make d. made

8. i think she is accustomed to.............english at a private school

a. taught b teach c. teaching d. be taught

9. the three fiends all...for the same job

a. requested b. applied c. intended d. referred

10. the children could hardly..........to leave their pets behind

a. forget b. regret c reding d. have read

11. this book was written by a well known writer. It is worth.......

a. read b. to read c. reading d. have read

12 she remembered the correct address only.............she had posted letter

a. since b. afferwards c. following d. after

13. you don't mind looking.... ..the baby , do you?

a. after b for c. at d. in

14. his parents never allowed him.......

a. a smoking b. smoking c. to smoke d. smoke

15. do you........to know when this castle was built?

a. ask b. happen c. imagine d. like

1
22 tháng 7 2019

1, I' d like to stay at home at home instead of............to the cinema

a.go b.going c.went d.to go

2.i would rather............unemployed than.............in that factory

a.to be/to work b. be/work c. being/work d.being/working

3. mary was so angry that she..........to see the manager

a.demanded b. hoped c. risked d. stopped

4. i don,t think that red dress...........her

a. suits b.matches c.cheers d.agrees

5. the weather is............awful that i don,t like going out this evenning

a. such b. so c. too d. very

6. let your name be written.............the sheet of raper

a.by b. on c. with d. of

7. my father had a worker............a fence round our garden

a. make b. making c. to make d. made

8. i think she is accustomed to.............english at a private school

a. taught b teach c. teaching d. be taught

9. the three fiends all...for the same job

a. requested b. applied c. intended d. referred

10. the children could hardly..........to leave their pets behind

a. forget b. regret c reding d. have read

11. this book was written by a well known writer. It is worth.......

a. read b. to read c. reading d. have read

12 she remembered the correct address only.............she had posted letter

a. since b. afferwards c. following d. after

13. you don't mind looking.... ..the baby , do you?

a. after b for c. at d. in

14. his parents never allowed him.......

a. a smoking b. smoking c. to smoke d. smoke

15. do you........to know when this castle was built?

a. ask b. happen c. imagine d. like

13 tháng 12 2017

\(\dfrac{1}{1-x}\)+\(\dfrac{1}{1+x}\)+\(\dfrac{2}{1+x^2}\)+\(\dfrac{4}{1+x^4}\)+\(\dfrac{8}{1+x^8}\)+\(\dfrac{16}{1+x^{16}}\)

=

=\(\dfrac{4}{1-x^4}\)+\(\dfrac{4}{1+x^4}\)+\(\dfrac{8}{1+x^8}\)+\(\dfrac{16}{1+x^{16}}\)

=\(\dfrac{8}{1-x^8}\)+\(\dfrac{8}{1+x^8}\)+\(\dfrac{16}{1+x^{16}}\)

=\(\dfrac{16}{1-x^{16}}\)+\(\dfrac{16}{1+x^{16}}\)

=\(\dfrac{32}{1-x^{32}}\)

8 tháng 8 2015

a) Ta có I 2x - 1 I = 2015

=> 2x-1=2015 hoặc 2x-1=2015

+,Th1: 2x-1=2015

             2x=2015+1

             2x=2016

              x=2016:2

             x=1008

+,Th2: 2x-1=-2015

              2x=-2015+1

             2x=-2014

              x=-2014:2

             x=-1007

Vậy x=1008, x=-1007

 

 

|x-1|<5

th1: x-1<5=> x<6

th2: x-1<-5=> x<-4

vậy x <6 hoặc<-4

|x-1|>5 cũng tương tự như thế

còn mấy câu khác Nguyễn Diệu Thảo làm thế chắc bạn cũng biết cách làm rồi

L_I_K_E CHO MÌNH NHA!!!

a) Chương trình bị lỗi

b) Chương trình bị lỗi

c) Chương trình bị lỗi luôn

26 tháng 7 2019

I I  là dấu giá trị tuyệt đối nhé

26 tháng 7 2019

|7 + 5x| = 1 - 4x

=> \(\orbr{\begin{cases}7+5x=1-4x\left(đk:x\le\frac{1}{4}\right)\\7+5x=4x-1\left(đk:x\ge\frac{1}{4}\right)\end{cases}}\)

=> \(\orbr{\begin{cases}7-1=-4x-5x\\7+1=4x-5x\end{cases}}\)

=> \(\orbr{\begin{cases}6=-9x\\8=-x\end{cases}}\)

=> \(\orbr{\begin{cases}x=-\frac{2}{3}\left(tm\right)\\x=-8\left(ktm\right)\end{cases}}\)

|4x- 2x| + 1 = 2x

=> |4x2 - 2x| = 2x - 1

=> \(\orbr{\begin{cases}4x^2-2x=2x-1\left(đk:x\ge\frac{1}{2}\right)\\4x^2-2x=1-2x\left(đk:x\le\frac{1}{2}\right)\end{cases}}\)

=> \(\orbr{\begin{cases}4x^2-2x-2x+1=0\\4x^2-2x-1+2x=0\end{cases}}\)

=> \(\orbr{\begin{cases}\left(2x-1\right)^2=0\\4x^2-1=0\end{cases}}\)

=> \(\orbr{\begin{cases}2x-1=0\\x^2=\frac{1}{4}\end{cases}}\)

=> \(\orbr{\begin{cases}x=\frac{1}{2}\\x=\pm\frac{1}{2}\end{cases}}\)(tm)

Vậy ...

31 tháng 8 2023

???

6 tháng 4 2019

#It's the moment when you're in good mood, you accidentally click back =.=

1) Calculate

\(P=1\frac{1}{3}.1\frac{1}{8}.1\frac{1}{15}....1\frac{1}{63}.1\frac{1}{80}\)

\(=\frac{4}{3}.\frac{9}{8}.\frac{16}{15}....\frac{64}{63}.\frac{81}{80}\)

\(=\frac{2.2}{1.3}.\frac{3.3}{2.4}.\frac{4.4}{3.5}....\frac{8.8}{7.9}.\frac{9.9}{8.10}\)

\(=\frac{2.9}{10}=\frac{9}{5}\)

7 tháng 8 2019

ta có: 10010 + 1 > 10010 - 1

⇒ A = \(\frac{100^{10}+1}{100^{10}-1}< \frac{100^{10}+1-2}{100^{10}-1-2}=\frac{100^{10}-1}{100^{10}-3}=B\)

vậy A < B

19 tháng 12 2015

a) |2x +1| = 7

Th1: 2x + 1 = 7 

<=> x  = 3

Th2: 2x + 1 = -7 

<=> x = -4 

15 tháng 6 2018

\(1)\) Ta có : 

\(\left|2x-1\right|\ge0\)

\(\Leftrightarrow\)\(A=\left|2x-1\right|+8\ge8\)

Dấu "=" xảy ra \(\Leftrightarrow\)\(\left|2x-1\right|=0\)

\(\Leftrightarrow\)\(2x-1=0\)

\(\Leftrightarrow\)\(2x=1\)

\(\Leftrightarrow\)\(x=\frac{1}{2}\)

Vậy GTNN của \(A\) là \(8\) khi \(x=\frac{1}{2}\)

Chúc bạn học tốt ~ 

15 tháng 6 2018

\(2)\) Ta có : 

\(B=\left|x-3\right|+\left|x-9\right|-1\)

\(B=\left|x-3\right|+\left|9-x\right|-1\ge\left|x-3+9-x\right|-1=\left|6\right|-1=6-1=5\)

Dấu "=" xảy ra khi và chỉ khi \(\left(x-3\right)\left(9-x\right)\ge0\)

Trường hợp 1 : 

\(\hept{\begin{cases}x-3\ge0\\9-x\ge0\end{cases}\Leftrightarrow\hept{\begin{cases}x\ge3\\x\le9\end{cases}\Leftrightarrow}3\le x\le9}\)

Trường hợp 2 : 

\(\hept{\begin{cases}x-3\le0\\9-x\le0\end{cases}\Leftrightarrow\hept{\begin{cases}x\le3\\x\ge9\end{cases}}}\) ( loại ) 

Vậy GTNN của \(B\) là \(5\) khi \(3\le x\le9\)

Chúc bạn học tốt ~