Gọi x (lớp) là số lớp nhiều nhất có thể chia (x )

x = ƯCLN(546; 238)

Ta có:

546 = 2.3.7.13

238 = 2.7.17

x = ƯCLN(546; 238) = 2.7 = 14

Vậy số lớp nhiều nhất có thể chia là 14 lớp

Mỗi lớp có:

546 : 14 = 39 (quyển sách giáo khoa Toán)

238 : 14 = 17 (quyển sách giáo khoa Văn)

Bổ sung điều kiện cho x như bài này nhé

Gọi x (lớp) là số lớp nhiều nhất có thể chia (x ∈ ℕ*)

x = ƯCLN(546; 238)

Ta có:

546 = 2.3.7.13

238 = 2.7.17

x = ƯCLN(546; 238) = 2.7 = 14

Vậy số lớp nhiều nhất có thể chia là 14 lớp

Mỗi lớp có:

546 : 14 = 39 (quyển sách giáo khoa Toán)

238 : 14 = 17 (quyển sách giáo khoa Văn)

A = 1 + 3 + 3² + ... + 3²⁰²³

⇒ 3A = 3 + 3² + 3³ + ... + 3²⁰²³ + 3²⁰²⁴

⇒ 2A = 3A - A

= (3 + 3² + 3³ + ... + 3²⁰²³ + 3²⁰²⁴) - (1 + 3 + 3² + ... + 3²⁰²³)

= 3²⁰²⁴ - 1

⇒ A = (3²⁰²⁴ - 1) : 2

⇒ A < B

A=1+3+3²+3³+3⁴+........+3²⁰²²+3²⁰²³

3A=3+3²+3³+............+3²⁰²³+3²⁰²⁴

3A-A=(3+3²+3³+..........+3²⁰²³+3²⁰²⁴

\(5^{3x-9}=1\\\Rightarrow 5^{3x-9}=5^0\\\Rightarrow3x-9=0\\\Rightarrow 3x=9\\\Rightarrow x=9:3\\\Rightarrow x=3\)

Vậy $x=3$.

:)))?

hết cứu

B

C. Việt Nam

giúp mình hai bài này vs

By Peter Winkler

On July 4, 1884 France presented the United States with an incredible birthday gift: The Statue of Liberty! Without its pedestal it’s as tall as a 15-story building. She represents the United States. But the world-famous Statue of Liberty standing in New York Harbor was built in France. The statue was presented to the U.S., taken apart, shipped across the Atlantic Ocean in crates, and rebuilt in the U.S. It was France’s gift to the American people.

It all started at dinner one night near Paris in 1865. A group of Frenchmen were discussing their dictator-like emperor and the democratic government of the U.S. They decided to build a monument to American freedom - and perhaps even strengthen French demands for democracy in their own country. At that dinner was the sculptor Frederic-Auguste Bartholdi. He imagined a statue of a woman holding a torch burning with the light of freedom.

Turning Bartholdi’s idea into reality took 21 years. French supporters raised money to build the statue, and Americans paid for the pedestal it would stand on. Finally, in 1886, the statue was dedicated.

(Source: https://kids.nationalgeographiC.com/)

1. When was the Statue of Liberty given to the US?

________It was given to the US on July 4 1884___________________________________________________________________________

2. What is the height of the Statue of Liberty?

____It is as tall as a 15-story building_______________________________________________________________________________

3. How was the Statue of Liberty transported to the US?

_______It was shipped across the Atlantic Ocean in crates____________________________________________________________________________

4. Who came up with the idea for the Statue of Liberty?

______Bartholdi came up with the idea for the Statue of Liberty_____________________________________________________________________________

5. How long did it take to complete the Statue of Liberty?

________It took 21 years to complete the Statur of Liberty___________________________________________________________________________

Exercise 9: Rewrite the sentence using comparatives.

1. No one in my class is taller than Hang.

à Hang ____________is the tallest student in my class________________________________________________________________.

2. Nothing in the shop is cheaper than this headphone.

à This headphone _____is the cheapest in the shop______________________________________________________________.

3. No one can swim faster than he does.

à _____He is the fastest___________________________________________________________________ swimmer.

4. I like chocolate ice cream best.

à I don’t _______like anything as much as ice cream____________________________________________________________________.

5. No one in his family can read faster than Peter.

à Peter reads the fastest in his family _____________________________________________________________.

a) 33

b) 12

a) 33

b) 14