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1. I'm bored ____sleeping and watching TV all day. A. up B .of C. with D. about 2. He found learning to drive easy and___ his driving test the first time. A. sat B. succeeded C. passed D. made 3. ____ the wet weather, the football match went ahead. A. Although B. Owing to C. However D. In spite of 4. I wish this exam_____easier. A. is B.will be C. would D. were 5. I'm going to____my dress dry-cleaned. A. have B. make C. send D. take 6. If I ____Minh's address, I____ her a letter. A....
Đọc tiếp

1. I'm bored ____sleeping and watching TV all day.

A. up B .of C. with D. about

2. He found learning to drive easy and___ his driving test the first time.

A. sat B. succeeded C. passed D. made

3. ____ the wet weather, the football match went ahead.

A. Although B. Owing to C. However D. In spite of

4. I wish this exam_____easier.

A. is B.will be C. would D. were

5. I'm going to____my dress dry-cleaned.

A. have B. make C. send D. take

6. If I ____Minh's address, I____ her a letter.

A. have-will write B. had-would write C. will have-write D. would have-wrote

7.''You can't have this football back____ you prosime not to kick at my cat again,'' the old lady said firmly.

A. until B. when C. while D. though

8. We saw the soldiers and the tanks____moved to the front.

A. that B. Who C. which D. whose

9. He___ very quickly after a long illness.

A. covered B. uncovered C. discovered D. recovered

10. Please go in. The doctor is free___-you now

A. see B. will see C. to see D. seeing

3
17 tháng 8 2018

1. I'm bored __with__sleeping and watching TV all day.

A. up B .of C. with D. about

2. He found learning to drive easy and__passed _ his driving test the first time.

A. sat B. succeeded C. passed D. made

3. __In spite of __ the wet weather, the football match went ahead.

A. Although B. Owing to C. However D. In spite of

4. I wish this exam__would ___easier.

A. is B.will be C. would D. were

5. I'm going to__make__my dress dry-cleaned.

A. have B. make C. send D. take

6. If I __have__Minh's address, I__will write __ her a letter.

A. have-will write B. had-would write C. will have-write D. would have-wrote

7.''You can't have this football back__though__ you prosime not to kick at my cat again,'' the old lady said firmly.

A. until B. when C. while D. though

8. We saw the soldiers and the tanks_who___moved to the front.

A. that B. Who C. which D. whose

9. He__covered _ very quickly after a long illness.

A. covered B. uncovered C. discovered D. recovered

10. Please go in. The doctor is free_to see__-you now

A. see B. will see C. to see D. seeing

17 tháng 8 2018

1. I'm bored ____sleeping and watching TV all day.

A. up B .of C. with D. about

2. He found learning to drive easy and___ his driving test the first time.

A. sat B. succeeded C. passed D. made

3. ____ the wet weather, the football match went ahead.

A. Although B. Owing to C. However D. In spite of

4. I wish this exam_____easier.

A. is B.will be C. would D. were

5. I'm going to____my dress dry-cleaned.

A. have B. make C. send D. take

6. If I ____Minh's address, I____ her a letter.

A. have-will write B. had-would write C. will have-write D. would have-wrote

7.''You can't have this football back____ you prosime not to kick at my cat again,'' the old lady said firmly.

A. until B. when C. while D. though

8. We saw the soldiers and the tanks____moved to the front.

A. that B. Who C. which D. whose

9. He___ very quickly after a long illness.

A. covered B. uncovered C. discovered D. recovered

10. Please go in. The doctor is free___you now

A. see B. will see C. to see D. seeing

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 ...

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 ~