a . 47/58 < 49/58 < 49/56

444+4444+444+4444+4444+4444+.......100 so=44 400

44x100=4400

444+4444+444+4444+4444+4444+.......100 so=44 400

44x100=4400

444+4444+444+4444+4444+4444+.......100 so=44 400

44x100=4400

b.>a nha

\(3333^{4444}=\left(3333^4\right)^{1111}=\left(1111^4.3^4\right)^{1111}\)

\(4444^{3333}=\left(4444^3\right)^{1111}=\left(1111^3.4^3\right)^{1111}\)

Do \(1111^4.3^4>1111^3.4^3\)

\(\Rightarrow\left(1111^4.3^4\right)^{1111}>\left(1111^3.4^3\right)^{1111}\)

\(\Rightarrow3333^{4444}>4444^{3333}\)

Cái này bạn áp dụng cộng dãy số cách đều là ra à

Số số hạng là: \(\dfrac{58-1}{1}+1=58\left(số\right)\)

Tổng của dãy là; \(\dfrac{58\left(58+1\right)}{2}=29\cdot59=1711\)

1. She got the job as a secretary without being able to use a computer. 2. Our teachers don't force us to go to extra classes. 3. I used to be strong when I was young. 4. They didn't use to go out much before they bought a motorbike. 5. I am used to wearing contact lenses. 6. He spent two hours fixing his car. 7. This motorbike cost 500 dollars. 8. She is interested in walking in the rain. 9. It's no use talking without doing anything. 10. I am going to have my car fixed by a man. 11. What is the price of this dress? 12. She'd rather Vietnamese food than American one. 13. My dad'd rather 'do' than talk. 14. You'd better try new things in order to know your ability. 15. There's no point in persuading him to go with you. 16. Her English is too bad for her to work as an interpreter. 17. This car is too expensive for me to buy. 18. You don't learn hard enough. 19. It's foolish of him to say that. 20. You'd better spend more time learning English.

1111 + 2222 = 3333

3333 + 2222 = 5555 

5555 + 4444 = 9999 

4444 + 3333 = 7777 

7777 + 1111 = 8888 

8888 + 1111 = 9999 

4444 + 2222 = 6666 

11111 + 22222 = 33333 

1111 + 2222 = 3333

3333 + 2222 = 5555

5555 + 4444 = 9999

4444 + 3333 = 7777

7777 + 1111 = 8888

8888 + 1111 = 9999

4444 + 2222 = 6666

11111 + 22222 = 33333

3333

5555

9999

7777

8888

6666

33333

hok tốt

\(3333^{4444}=\left(1111\right)^{3.4444}=1111^{13332}\)

\(4444^{3333}=1111^{4.3333}=1111^{13332}\)

Vậy = nhau

cảm ơn !

3333⁴⁴⁴⁴=(3333⁴)¹¹¹¹=(3⁴x1111⁴)¹¹¹¹

4444³³³³=(4444³)¹¹¹¹=(4³x1111³)¹¹¹¹

vì 3⁴x1111⁴>4³x1111³ nên 3333⁴⁴⁴⁴>4444³³³³

ko biết

????????????????????????????

3333 4444>4444 3333