1. C

2. A

3. C

4. D

5. D

6. B

7. B

8. C

9. C

10. B

11. B

12. A

13. A

14. A

15. C

16. B

17. D

18. B

19. B

20. A

21. A

22. B

23. A

24. C

25. A

❤ HOK TT ❤

1. B

2. C

3. D

4. C

5. B

6. D

7. A

❤ HOK TT ❤

( 1 + \(\dfrac{2}{5}\)).( 1 + \(\dfrac{2}{7}\) ).( 1 + \(\dfrac{2}{9}\)).( 1 + \(\dfrac{2}{11}\)).....( 1 + \(\dfrac{2}{97}\)).( 1 + \(\dfrac{2}{99}\))

= \(\dfrac{7}{5}\).\(\dfrac{9}{7}\).\(\dfrac{11}{9}\).\(\dfrac{13}{11}\)...\(\dfrac{99}{97}\).\(\dfrac{101}{99}\)

= \(\dfrac{7.9.11.13...99.101}{5.7.9.11...97.99}\)

= \(\dfrac{101}{5}\)

❤ HOK TT ❤

Mk nghĩ là D

❤ HOK TT ❤