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1)I'm hungry. I haven't eaten all day. ->Because............................................................................ 2)We spoke to the man. He was very humorous. ->The man who................................................................... 3)The test was very difficult, but Hai could do it well. ->Even through.................................................................... 4)'' Why don't we give lessons to poor children?'' ->Lan...
Đọc tiếp

1)I'm hungry. I haven't eaten all day.

->Because............................................................................

2)We spoke to the man. He was very humorous.

->The man who...................................................................

3)The test was very difficult, but Hai could do it well.

->Even through....................................................................

4)'' Why don't we give lessons to poor children?''

->Lan suggests.....................................................................

5)celebrated/ joyful/ is/ countries/ Easter/ a/ in/ festival/ is/ many/ which. (put the words in the right order)

->...........................................................................................

6)We don't have enough money, so we can't buy that modern computer.

->If........................................................................................

7)The explorer was Chirstopher Columbus. He discovered American.

->The explorer......................................................................

8)The last time we were here was in 2014.

->We.....................................................................................

9)'' Why don't we use public buses instead of private vehicles?'' said the environmentalist.

->The environmentalist suggested..........................................................................

2
30 tháng 5 2018

1)I'm hungry. I haven't eaten all day.

->Because I haven't eaten all day, I'm hungry

2)We spoke to the man. He was very humorous.

->The man whom we spoke to was very humorous

3)The test was very difficult, but Hai could do it well.

->Even though the test was very difficult, Hai could do it well

4)'' Why don't we give lessons to poor children?''

->Lan suggests giving lessons to poor children

5)celebrated/ joyful/ is/ countries/ Easter/ a/ in/ festival/ is/ many/ which. (put the words in the right order)

-> Easter is a joyful festival which is celebrated in many countries

6)We don't have enough money, so we can't buy that modern computer.

->If we had enough money, we could buy that modern computer

7)The explorer was Chirstopher Columbus. He discovered American.

->The explorer who discovered American was Chirstopher Columbus

8)The last time we were here was in 2014.

->We haven't been here since 2014

9)'' Why don't we use public buses instead of private vehicles?'' said the environmentalist.

->The environmentalist suggested using public buses instead of private vehicles

30 tháng 5 2018

1)I'm hungry. I haven't eaten all day.

->Because I haven't eaten all day, I'm hungry.

2)We spoke to the man. He was very humorous.

->The man who we spoke was very humorous

3)The test was very difficult, but Hai could do it well.

->Even though the test was very difficult, Hai could do it well.

4)'' Why don't we give lessons to poor children?''

->Lan suggests giving lessons to poor children

5)celebrated/ joyful/ is/ countries/ Easter/ a/ in/ festival/ is/ many/ which. (put the words in the right order)

->Easter is a joyful festival which is celebrated in many countries

6)We don't have enough money, so we can't buy that modern computer.

->If we have enough money, we can buy that modern computer.

7)The explorer was Chirstopher Columbus. He discovered American.

->The explorer who discovered American is Chirstopher Columbus

8)The last time we were here was in 2014.

->We haven't been here since 2014

9)'' Why don't we use public buses instead of private vehicles?'' said the environmentalist.

->The environmentalist suggested that we should use public buses instead of private vehicles

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 ~