4.

a, \(A=\sqrt[3]{15\sqrt{3}+26}=\sqrt[3]{\left(\sqrt{3}+2\right)^3}=\sqrt{3}+2\)

b, \(B=\sqrt[3]{5+2\sqrt{13}}+\sqrt[3]{5-2\sqrt{13}}\)

\(\Rightarrow2B=\sqrt[3]{40+16\sqrt{13}}+\sqrt[3]{40-16\sqrt{13}}\)

\(=\sqrt[3]{\left(\sqrt{13}+1\right)^3}+\sqrt[3]{\left(\sqrt{13}-1\right)^3}\)

\(=\sqrt{13}+1+\sqrt{13}-1=2\sqrt{13}\)

\(\Rightarrow B=\sqrt{13}\)

c, \(C=\sqrt[3]{182-\sqrt{33125}}+\sqrt[3]{182+\sqrt{33125}}\)

\(\Rightarrow C^3=364+3\sqrt[3]{182-\sqrt{33125}}.\sqrt[3]{182+\sqrt{33125}}\left(\sqrt[3]{182-\sqrt{33125}}+\sqrt[3]{182+\sqrt{33125}}\right)\)

\(=364-3C\)

\(\Rightarrow C^3+3C-364=0\)

\(\Leftrightarrow C=7\)

54 A

55 A

56 D

56 C

58 A

59 A

60 B

61 A

62 B

57 A

1, Ancester ship

2, It is a sacred place

3, Guests

4,Lullabies

5,cultivate

1,What do the Muong people often play?

2,Which is the largest ethnic group in VN

3, Whose the Cham children are named of?

4,What are the highlights of the Muong costume?

5,Where do the Muong live in with abundant......?

is raining 

is taking - hopes - will pass 

are visiting - visit 

did not write - phoned 

did not visit - caught

21 is raining

22 is taking/hopes/will pas

25 are visiting

26 visited

27 didn't write

28 phoned

29 didn't visit

30 caught

is raining 

is taking - hopes - will pass 

are visiting - visit 

didn't write - phoned 

didn't visit - caught

`(8x^3y^4z) : (4x^2y^4)`

`= (8:4) . (x^3 : x^2) . (y^4 : y^4) . z`

`= 2xz.`

=2xz

\(y\left(17+21\right)=532\)

\(y=532:38=14\)

y . 17 + y . 21 = 532

y.(17+21)=532

y.38=532

y=532:38=14

\(y\left(17+21\right)=532\)

\(y\times38=532\)

\(y=532:38\)

\(y=14\)

Chào Minh Anh Can nhé!

Cấu trúc so sánh hơn trong tiếng Anh

Cấu trúc với tính từ ngắn (Short Adj): thêm đuôi “er” vào sau tính từ hoặc phó từ ngắn.

S + V + adj/adv + er + than + N/pronoun

Lưu ý: Với tính từ có âm tận cùng là “y” thì phải đổi thành “i” thêm “er” và nó bị coi là tính từ ngắn. Ex: pretty => prettier

Trong trường hợp tính từ ngắn có 1 nguyên âm kẹp giữa 2 phụ âm tận cùng thì phải gấp đôi phụ âm cuối. Ex: big => bigger

Tính từ dài (Long Adj): thêm more/less.

S + V + more/less + adj/adv + than + N/pronoun

Ex: Lan is more beautiful than me.

Chúc em học vui vẻ và có nhiều trải nghiệm bổ ích tại Hoc24.vn nhé!

PTHH: 2Al + 6HCl → 2AlCl₃ + 3H₂

PTHH: Mg(OH)₂ + 2HCl → MgCl₂ + 2H₂O

PTHH: Fe₂O₃ + 6HCl → 2FeCl₃ + 3H₂O

PTHH: K₂O + 2HCl → 2KCl + H₂O

Lần sau em đăng câu hỏi đúng box để mọi người hỗ trợ nha

PTHH: 2Al + 6HCl → 2AlCl₃ + 3H₂

PTHH: Mg(OH)₂ + 2HCl → MgCl₂ + 2H₂O

PTHH: Fe₂O₃ + 6HCl → 2FeCl₃ + 3H₂O

PTHH: K₂O + 2HCl → 2KCl + H₂O

1 knowing the answer, they told us

2 the unique handicraft, we didn't like it

3 We looked into these machines so that we could find out the method 

We looked into these machines so as to find out the method 

4 Jack's poverty, everyone looks up to him

5 In order to choose the best chair, Linda looked through this catalouge 

6 is not as dirty as this one

7 I didn't play as successfully as Linda

8 A dog can't run as fast as a horse

A dog runs more slowly than a horse

9 No rivers in the world is as long as the Nile

10 No one in my family talks as politely as Linda