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1. I'm afraid I have no time to help you now. I ( write ).......a report. But I promise I ( give )....you some help later 2. Look! It ( rain ).....outside. The rain ( get )....heavier 3. Remember that the sun ( rise ) .........in the east 4. The students ( celebrate).....Student's Day tomorrow 5. Hoa ( have )......a birthday party this evening 6. She ( get )......taller and taller this year 7. The Greens ( go )......to the movies once a month 8. There ( be ).......a traffic jam in the...
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1. I'm afraid I have no time to help you now. I ( write ).......a report. But I promise I ( give )....you some help later

2. Look! It ( rain ).....outside. The rain ( get )....heavier

3. Remember that the sun ( rise ) .........in the east

4. The students ( celebrate).....Student's Day tomorrow

5. Hoa ( have )......a birthday party this evening

6. She ( get )......taller and taller this year

7. The Greens ( go )......to the movies once a month

8. There ( be ).......a traffic jam in the city center almost everyday

9. Where is Mai? What ( she/do) ........?

10. They ( live )........in that house for ten years

11. This is the first time he ( drive ).......a car

12. What time ( he/be).....here? - He ( be )......in half an hour

13. The sea ( cover ) ......most of the surface of the earth

14. When the Queen ( arrive) ......, the crowd will stand up

15. How long ( you/learn).....English? - For five years

16. I want to speak to Professor Wilson when he ( be ).......free

17. He ( come ).....before you leave

18. ( you/help) .....us when you finish your work?

19. We won't to go out until it ( stop )......raining

20. Listen! Why ( the baby/cry )........?

2
7 tháng 1 2019

1. I'm afraid I have no time to help you now. I ( write )..AM WRITING.....a report. But I promise I ( give )...WILL GIVE.you some help later

2. Look! It ( rain )..IS RAINING...outside. The rain ( get ).IS GETTING...heavier

3. Remember that the sun ( rise ) ......RISES...in the east

4. The students ( celebrate)..WILL CELEBRATE...Student's Day tomorrow

5. Hoa ( have )...IS GOING TO HAVE...a birthday party this evening

6. She ( get )....IS GETTING..taller and taller this year

7. The Greens ( go ).GO.....to the movies once a month

8. There ( be )....IS...a traffic jam in the city center almost everyday

9. Where is Mai? What ( she/do) ...IS SHE DOING.....?

10. They ( live ).....HAVE LIVED...in that house for ten years

11. This is the first time he ( drive )....HAS DRIVEN...a car

12. What time ( he/be)..WILL HE BE ...here? - He ( be )..WILL BE....in half an hour

13. The sea ( cover ) ..COVERD....most of the surface of the earth

14. When the Queen ( arrive) ...ARRIVES..., the crowd will stand up

15. How long ( you/learn)...HAVE YOU LEARNT..English? - For five years

16. I want to speak to Professor Wilson when he ( be )...IS....free

17. He ( come )...WILL COME..before you leave

18. ( you/help) ...WILL YOU HELP..us when you finish your work?

19. We won't to go out until it ( stop )...STOPS...raining

20. Listen! Why ( the baby/cry ).....IS THE BABY CRYING...?

7 tháng 1 2019

1. I'm afraid I have no time to help you now. I ( write )...AM WRITING ....a report. But I promise I ( give ).WILL GIVE...you some help later

2. Look! It ( rain )..IS RAINING...outside. The rain ( get )..IS GETTING..heavier

3. Remember that the sun ( rise ) ...RISES......in the east

4. The students ( celebrate).WILL CELEBRATE Student's Day tomorrow

5. Hoa ( have )...WILL HAVE...a birthday party this evening

6. She ( get )...IS GETTING...taller and taller this year

7. The Greens ( go )...GO...to the movies once a month

8. There ( be ).....IS..a traffic jam in the city center almost everyday

9. Where is Mai? What ( she/do) ....IS SHE DOING....?

10. They ( live )...HAVE LIVED.....in that house for ten years

11. This is the first time he ( drive )...HAS DRIVEN....a car

12. What time ( he/be)..IS HE...here? - He ( be )...IS...in half an hour

13. The sea ( cover ) ....COVERS..most of the surface of the earth

14. When the Queen ( arrive) .ARRIVES....., the crowd will stand up

15. How long ( you/learn)..HAVE YOU LEARNT...English? - For five years

16. I want to speak to Professor Wilson when he ( be )...IS....free

17. He ( come ).WILL COME....before you leave

18. ( you/help) .DID YOU HELP....us when you finish your work?

19. We won't to go out until it ( stop )..STOPS....raining

20. Listen! Why ( the baby/cry )...IS THE BABY CRYING.....?

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 ~