gửi link cho mk đi bn

I.Make question for with bold words(Đặt câu hỏi với từ in đậm):

1.It's ten to ten.

..........WHAT TIME IS IT?.........

2.The train is going to Nha Trang.

.......WHERE IS THE TRAIN GOING TO?........

3.Mr.Nam goes to work by car every day.

.........HOW DOES MR NAM GO TO WORK EVERYDAY?........

4.Lan is listening to music at the moment.

........WHAT IS LAN DOING AT THE MOMENT?......

II.Write the comparison sentences(Viết câu so sánh):

Example: 0.Hue / small / Hanoi Ans: Hue is smaller than Hanoi.

1.Lan / young / Hoa

Ans: LAN IS YOUNGER THAN HOA.

2.My uncle / old / my aunt

Ans: MY UNCLE IS OLDER THAN MY AUNT.

3.This ruler / long / that one

Ans: THIS RULER IS LONGER THAN THAT ONE.

4.This room / large / my room

Ans: THIS ROOM IS LARGER THAN MY ROOM.

I.Make question for with bold words(Đặt câu hỏi với từ in đậm):

1.It's ten to ten.

What time is it?

2.The train is going to Nha Trang.

Where is the train going to?

3.Mr.Nam goes to work by car every day.

How does Mr.Nam go to work every day?

4.Lan is listening to music at the moment.

What is Lan doing at the moment?

II.Write the comparison sentences(Viết câu so sánh):

Example: 0.Hue / small / Hanoi Ans: Hue is smaller than Hanoi.

1.Lan / young / Hoa Ans: Lan is younger than Hoa

2.My uncle / old / my aunt Ans: My uncle is older than my aunt

3.This ruler / long / that one Ans: This ruler is longer than that one

4.This room / large / my room Ans:This room is larger than my room

mình có một câu hỏi ở ngữ văn đó

trả lời giúp mình đi mình sắp kiểm tra rồi

Please!!!!!!!!!!!!!!!!!!!

Hello, I am Hoang Anh ! And you ?

Yeah ! I am Chau, 11 Years old, I am a student at class 6D1.

1) 35

2) (30 + 905 : 5 + 9) - (2 x 5 + 8 x 5)

= (30 + 181 + 9) - [(2 + 8) x 5]

= (30 + 190) - (10 x 5)

= 220 - 50

= 170

3) 8 + 290 : \(\frac{ans}{290}\)- 845 + 555

= 8 + 290 : 1 - 845 + 555

= 8 + 290 - 845 + 555

= 298 - 290

= 8

Học tốt!!!

nhân từng hạng tử của giả thiết với 2 rồi cộng và trừ từng cái một là ra còn gì nx

Trình bày dài lắm

Ta có : \(\frac{x}{a+2b+c}=\frac{y}{2a+b-c}=\frac{z}{4a-4b+c}\)

=> \(\frac{a+2b+c}{x}=\frac{2a+b-c}{y}=\frac{4a-4b+c}{z}\)

=> \(\frac{a+2b+c}{x}=\frac{2\left(2a+b-c\right)}{2y}=\frac{4a-4b+c}{z}=\frac{a}{x+2y+z}\)(1)

=> \(\frac{2\left(a+2b+c\right)}{2x}=\frac{2a+b-c}{y}=\frac{4a+4b+c}{z}=\frac{b}{2x+y-z}\)(2)

=> \(\frac{4\left(a+2b+c\right)}{4x}=\frac{4\left(2a+b-c\right)}{4y}=\frac{4a-4b+c}{z}=\frac{c}{4x-4y+z}\)(3)

Từ (1);(2);(3) suy ra \(\frac{a}{x+2y+z}=\frac{b}{2x+y-z}=\frac{c}{4x-4b+z}\)

easy!\(\frac{x}{a+2b+c}=\frac{y}{2a+b-c}=\frac{z}{4a-4b+c}=\frac{2y}{4a+2b-2c}=\frac{x+2y+z}{a+2b+c+4a+2b-2c+4a-4b+c}\)

\(=\frac{x+2y+z}{9a}\left(1\right)\)

\(=\frac{2x}{2a+4b+2c}=\frac{2x+y-z}{2a+4b+2c+2a+b-c-4a+4b-c}=\frac{2x+y-z}{9b}\left(2\right)\)

\(=\frac{4x}{4a+8b+4c}=\frac{4y}{8a+4b-4c}=\frac{4x-4y+z}{4a+8b+4c-8a-4b+4c+4a-4b+c}=\frac{4x-4y+z}{9c}\left(3\right)\)

Từ (1),(2),(3) ta được:\(\frac{x+2y+z}{9a}=\frac{2x+y-z}{9b}=\frac{4x-4y+z}{9c}\)

\(\Rightarrow\frac{x+2y+z}{a}=\frac{2x+y-z}{b}=\frac{4x-4y+z}{c}\)

\(\Rightarrow\frac{a}{x+2y+z}=\frac{b}{2x+y-z}=\frac{c}{4x-4y+z}\left(đpcm\right)\)

e

bn nha

J E ans 

em nghĩ là 115

UỦa cj tên gì vậy. Avatar xinh qué 🤩🤩🤩🤩🤩

Ủa cj ko muốn cho mn bt nên cj mới để vậy đó( ib nick Facebook cj ik ròi bt)

Cứu

Ta có: A = 1.2.3 + 2.3.4 + 3.4.5 + ... + 18.19.20
=> 4A = 4(1.2.3 + 2.3.4 + 3.4.5 + ... + 18.19.20)
=> 4A = 1.2.3.4 + 2.3.4.4 + 3.4.5.4 +...... +18.19.20.4
=> 4A = 1.2.3.4 + 2.3.4(5 - 1) + 3.4.5.(6 - 2) +..... +18.19.20.(21 - 17)
=> 4A = 1.2.3.4 + 2.3.4.5 - 2.3.4 + 3.4.5.6 - 2.3.4.5 + ..... + 17.18.19.20 - 17.18.19.20
=> 4A =18.19.20
=> 4A = 6840
=> A = 1710

Đặt A=1.2.3+2.3.4+3.4.5+4.5.6+...+18.19.20

4A=(1.2.3+2.3.4+3.4.5+4.5.6+...+18.19.20)4

4A=1.2.3(4-0)+2.3.4(5-1)+3.4.5(6-2)+4.5.6(7-3)+...+18.19.20.(21-17)

4A=1.2.3.4+2.3.4.5-1.2.3.4+3.4.5.6-2.3.4.5+4.5.6.7-3.4.5.6+...+ 18.19.20.21-17.18.19.20
=>A =18.19.20.21

=>A+18.19.20.21/4

=> A=35910