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1. stayed
2. visited
3. got
4. wrote
5. took
6. ate
7. had
8. did
9. played
10. drank
11. saw
12. gave
13. returned
14. remembered
15. thought
16. could
17. read
18. told
19. talked
20. walked
21. went
22. received
23. teached
24. stopped
25. made
26. bought
27. been
28. moved
29. cried
30. sat
Mình chỉ làm lụi thôi , không biết đúng hay không ???
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Dịch ra là: Ta có: 3A = 3. (1 + 3 + 32 + 33 + ... + 399 + 3100) (1 + 3 + 32 + 33 + ... + 399 + 3100) 3A = 3 + 32 + 33 + ... + 3100 + 31013 + 32 + 33 + ... + 3100 + 3101 Suy ra: 3A - A = (3 + 32 + 33 + ... + 3100 + 3101) - (1 + 3 + 32 + 33 + ... + 399 + 3100) (3 + 32 + 33 + ... + 3100 + 3101) - (1 + 3 + 32 + 33 + ... + 399 + 3100) ⇒⇒ A = 3101−123101−12 Vậy A = 3101−12
Mà đoạn 2A sai nhé bạn, sửa lại:
2A = 3101−13101−1 2A=-10001
A=-10001/2
A=-5000,5
Vậy A=-5000,5
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a (-2)^3.(-2)^2+32
= (-8) . 4 + 32
= ( -32) + 32
= 0
b (-15).12-8.(-12)
= 15 . (-12) - 8.(-12)
= (-12) . (15-8)
= (-12) . 7
= (-84)
# HOK TỐT #
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1. hair
2. course
3. country
4. photo
5. dance
6. paint
7. end
8. because
9. arm
10. cold
11. coy
12. climb
13. doctor
14. colour
15. summary
16. picture
17. eleven
18. watch
19. jeans
20. watch
21. begin
22. strong
2. course
3. country
4. photo .
5. dance
6. paint .
7. end
8. because
9. arm
10 . cold
12 . climb
13 . doctor
14 . colour
15 . summary
16 . picture
17 . eleven
18 . watch
19 . jeans
20 . watch
21 . begin
22 . strong
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1 faster
2 thinner
3 larger
4 tired
5 better
6 cleverer
7 shorter
8 earlier
9 happier
10 more carefully
11 more attractive
12 noisier
13 older
14 more interesting
15 wider
16 more independent
17 drier
18 more polluted
19 longer
20 cheaper
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Write down the correct form of the word in brackets (adjective or adverb).
11. Niagara Falls form a ________________ border between the United States and Canada.
(natural/naturally)
12. Tourists visit this place ________________ (frequently/ frequent) .
13. The Falls are very________________ (noisy/ noisily)
14. So you must speak ________________ or nobody can understand you. (loudly/loud)
15. Many years ago, the Iroquois tribe lived here________________ (peacefully/ peaceful)
16. He is a clever boy. (clever)
17. He is tired because he has worked hard. (hard)
18. He isn’t tired because he has hardly worked. (hard)
19. She is a quiet girl. (quiet)
20. She went to bed quietly. (quiet)
21. He is not a good student but he writes well. (good)
22. You should speak more softly. (soft)
23. The children behaved badly. (bad)
24. The brave men fought bravely. (brave)
25. They lived together happily. (happy)
26. She looks pretty. (pretty)
27. That milk tastes sour. (sour)
28. I don’t know exactly where they live. (exact)
29. She turned pale. (pale)
30. This brown fur feels soft . (soft)
31. These children are good at English. (good)
32. Your brother hardly works at all. (hard)
33. Ann nearly had an accident last Sunday. (near)
Write down the correct form of the word in brackets (adjective or adverb).
11. Niagara Falls form a ________________ border between the United States and Canada.
(natural/naturally)
12. Tourists visit this place ________________ (frequently/ frequent) .
13. The Falls are very________________ (noisy/ noisily)
14. So you must speak ________________ or nobody can understand you. (loudly/loud)
15. Many years ago, the Iroquois tribe lived here________________ (peacefully/ peaceful)
16. He is a _________clever_______boy. (clever)
17. He is tired because he has worked ________hard ________. (hard)
18. He isn’t tired because he has _________hardly ( hiếm khi)_______worked. (hard)
19. She is a ________quiet________girl. (quiet)
20. She went to bed ________quietly________. (quiet)
21. He is not a good student but he writes __________well ______. (good)
22. You should speak more ________softly________. (soft)
23. The children behaved ________badly________. (bad)
24. The brave men fought ________bravely________. (brave)
25. They lived together ________happily________. (happy)
26. She looks _________pretty_______. (pretty)
27. That milk tastes ________________. (sour)
28. I don’t know __________sour______where they live. (exact)
29. She turned ________pale________. (pale)
30. This brown fur feels ________soft________. (soft)
31. These children are ______good__________at English. (good)
32. Your brother ________hardly ________works at all. (hard)
33. Ann _______nearly_________had an accident last Sunday. (near)