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1. I'm very glad (see) ...you againt 2.English is an important language ( master) 3. Have you got anything ( eat) .....now 4. We go to the library every day (read) ...books 5. I hear someone ( knock) ...at the front door 6. Most passengers diskike ( have) ....to sit in small uncomefortable seats on long flights 7.He always refuses ( help) ...other 8.I was only trying ...him ( upset/ help) 9. I'll help you ( arrange) ...the party if you like 10. Did you see him ....(go out) 11...
Đọc tiếp

1. I'm very glad (see) ...you againt

2.English is an important language ( master)

3. Have you got anything ( eat) .....now

4. We go to the library every day (read) ...books

5. I hear someone ( knock) ...at the front door

6. Most passengers diskike ( have) ....to sit in small uncomefortable seats on long flights

7.He always refuses ( help) ...other

8.I was only trying ...him ( upset/ help)

9. I'll help you ( arrange) ...the party if you like

10. Did you see him ....(go out)

11 She noticed him ...( leave) the party without saying goodbye

12 John decided ...( give)up ...(smoke)

13 She smelt something ( burn )....and saw smoke (rise)..............

14 He doesm't spent much time (read)......his lesson

15 They spend a lot of money ( modernize) .....the house

16 The children admitted ( take) the money

17 .....(Fail) twice he didn't want to try again

18Not (do) ...the homework he got a bad mark

19 The girl ( talk) ......to you this morning is my sister

20 (open)....the bottle boy poured the dink

21( Finished) ...the work they went out for shopping

22 (Close) ...the factory means (put) ....people out of work

23 We had to stand in a queue (wait) .....for the bank to open

1
14 tháng 12 2017

1. I'm very glad (see) .to see..you againt

2.English is an important language to master ( master)

3. Have you got anything ( eat) ...to eat..now

4. We go to the library every day (read) .to read..books

5. I hear someone ( knock) ..knocking.at the front door

6. Most passengers diskike ( have) ..having..to sit in small uncomefortable seats on long flights

7.He always refuses ( help) ..to help.other

8.I was only trying ..to help.him ( upset/ help)

9. I'll help you ( arrange) ..arrange.the party if you like

10. Did you see him ..go out..(go out)

11 She noticed him ..to leave.( leave) the party without saying goodbye

12 John decided ..to give.( give)up ..smoking.(smoke)

13 She smelt something ( burn )..burning..and saw smoke (rise)......rising........

14 He doesm't spent much time (read)....reading..his lesson

15 They spend a lot of money ( modernize) ...modernizing..the house

16 The children admitted ( take)taking the money

17 ..Having failed...(Fail) twice he didn't want to try again

18Not (do) .having done..the homework he got a bad mark

19 The girl ( talk) ...talked...to you this morning is my sister

20 (open)..having opened..the bottle boy poured the dink

21( Finished) ..having finished.the work they went out for shopping

22 (Close) .closing..the factory means (put) ...putting.people out of work

23 We had to stand in a queue (wait) ...to wait..for the bank to open

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 ~